scholarly journals Kajian Morfometri Rajungan (Portunus pelagicus) Linnaeus, 1758 (Crustacea: Portunidae) pada Dua Fase Bulan yang Berbeda di Perairan Desa Tunggulsari, Rembang

2021 ◽  
Vol 10 (1) ◽  
pp. 109-116
Author(s):  
Wukir Berliana Pratiwi ◽  
Ria Azizah Tri Nuraini ◽  
Widianingsih Widianingsih
Keyword(s):  
Full Moon ◽  
Carapace Width ◽  
Major Influence ◽  
Lunar Phase ◽  
Exploratory Research ◽  
Moon Phase ◽  
Portunus Pelagicus ◽  
Moon Phases ◽  
Research Activities ◽  
New Moon

Fase bulan secara periodik mengalami perubahan dan menjadi faktor yang mempengaruhi perairan secara fisika, kimia, maupun biologi. Kondisi tersebut di wilayah perairan laut menimbulkan fenomena pasang surut yang memiliki pengaruh besar terhadap kehidupan biota laut seperti rajungan (Portunus pelagicus). Strategi penangkapan yang tepat dapat dilakukan dengan menentukan target satu spesies atau dengan cara melihat fase bulan. Penelitian ini bertujuan untuk melakukan kajian morfometri, nisbah kelamin, hubungan lebar berat, dan tingkat kematangan gonad rajungan (Portunus pelagicus) yang tertangkap nelayan pada fase bulan purnama dan bulan mati dari Perairan Desa Tunggulsari, Rembang. Pengambilan data dilakukan terhadap rajungan (Portunus pelagicus) yang tertangkap oleh nelayan dari perairan Desa Tunggulsari. Kegiatan penelitian dilakukan pada tanggal 9 Januari 2020, 28 Januari 2020, 10 Februari 2020, 25 Februari 2020, 10 Maret 2020, dan 24 Maret 2020. Hasil penelitian berdasarkan uji T statistik menunjukkan bahwa ada perbedaan komposisi rajungan dari fase bulan purnama dan bulan mati dengan selisih yang tidak signifikan. Rajungan yang tertangkap pada fase bulan purnama memiliki rata-rata ukuran berat dan lebar yang lebih kecil dibandingkan pada fase bulan mati. Analisis power curve hubungan lebar dan berat rajungan yang ada di perairan Desa Tunggulsari bersifat allometrik negatif yang berarti pertumbuhan lebar karapas lebih cepat dibandingkan beratnya.  The lunar phase periodically changes and becomes a factor that affects the waters physically, chemically, and biologically. These conditions in the marine waters cause tidal phenomena which have a major influence on marine life such as blue swimming crab (Portunus pelagicus). The right fishing strategy can be done by determining the target of one species or by looking at the phases of the moon. This study aims to study the morphometry, sex ratio, weight-width relationship, and maturity level of the crab gonads (Portunus pelagicus) caught by fishermen in the full moon and new moon phases of the Tunggulsari Waters, Rembang. The method used in this research is descriptive exploratory. Research activities were carried out on January 9, 2020, January 28, 2020, February 10, 2020, February 25, 2020, March 10, 2020, and March 24, 2020. The results of the study based on the statistical T test showed that there was an insignificant difference in the catch of the full moon and new moon phases. The crabs that are caught in the full moon phase have an average size of weight and width that is smaller than in the new moon phase. Analysis of the relationship between the width and weight of small crabs in the waters of Tunggulsari Waters is negative allometric, which means that the carapace width grows faster than its weight.

scholarly journals Morfometri Portunus pelagicus Linnaeus, 1758 (Malacostraca : Portunidae) Pada Fase Bulan Yang Berbeda Di Perairan Betahwalang, Demak

2019 ◽  
Vol 8 (2) ◽  
pp. 204-210
Author(s):  
Errizal Machmud Putra ◽  
Rini Pramesti ◽  
Gunawan Widi Santosa
Keyword(s):  
Full Moon ◽  
Environmental Parameters ◽  
Moon Phase ◽  
Swimming Crab ◽  
The Moon ◽  
Portunus Pelagicus ◽  
Natural Factors ◽  
New Moon ◽  
Descriptive Method

Rajungan (Portunus pelagicus) merupakan komoditas unggulan Indonesia. Perairan Betahwalang, Kabupaten Demak memiliki sumberdaya rajungan yang  potensial dengan tingkat eksploitasi yang tinggi. Rajungan ini ditangkap setiap hari tanpa memperhatikan faktor alam berupa fase bulan yang menyebabkan menurunnya populasi. Informasi penangkapan berdasarkan fase bulan diperlukan agar populasi rajungan dapat terjaga. Tujuan Penelitian ini adalah mengkaji jumlah dan sebaran morfometri rajungan yang tertangkap pada fase bulan purnama dan bulan baru di perairan Betahwalang. Penelitian ini dilakukan dari November 2017 sampai Februari 2018 di perairan Betahwalang. Metode penelitian yang digunakan yaitu metode deskriptif. Penentuan lokasi penelitian berdasarkan area penangkapan rajungan di perairan Betahwalang. Pengambilan data dilakukan 8 kali dari tanggal 5 November 2017 sampai 18 Februari 2018. Pengambilan data berupa jumlah, lebar karapas, berat, jenis kelamin rajungan, dan parameter lingkungan. Hasil penelitian menunjukkan total rajungan tertangkap yaitu 448 ekor, 296 ekor pada Bulan Purnama dan 152 ekor pada Bulan Baru. Morfometri rajungan ukuran ≤ 10 cm pada Bulan Purnama 190 ekor lebih banyak dari Bulan Baru 90 ekor. Rajungan ukuran > 10 cm pada Bulan Baru 106 ekor lebih banyak dari Bulan Baru 62 ekor. Blue Swimming Crab (Portunus pelagicus) is Indonesia's flagship commodity. The waters of Betahwalang, Demak Regancy have potential Blue Swimming Crab resources with high levels of exploitation.  The crabs are catched every day regardless of natural factors, such as the moon phase that causes the population to decline. Blue Swimming Crab catch’s information based on the moon phase is required for the population to sustaine. The purpose of this research is to study the amount and distribution of Blue Swimming Crab morphometry catched on the full and new moon phase in Betahwalang waters. The study was conducted from November  2017 till February 2018 in the waters of Betahwalang. The research method used was descriptive method. Determination of research location based on Blue Swimming Crab catching area in Betahwalang waters. The data were collected 8 times from November 5, 2017 till February 18, 2018. Data were collected in number, width of carapace, weight, sex, and environmental parameters. The results showed total of catched crabs, were 296 crabs on Full Moon, and 152 crabs on New Moon. Blue Swimming Crab morphometry size ≤ 10 cm on Full Moon was 190 crabs more than New Moon was 90 crabs. Then, in Size> 10 cm on New Moon was 106 crabs more than New Moon was 62 crabs.

Activity of Microtus pennsylvanicus related to moon phase and moonlight revealed by the sand transect technique

1969 ◽  
Vol 47 (6) ◽  
pp. 1183-1186 ◽  
Author(s):  
G. J. Doucet ◽  
J. R. Bider
Keyword(s):  
Population Growth ◽  
Full Moon ◽  
Microtus Pennsylvanicus ◽  
Moon Phase ◽  
The Moon ◽  
Moon Phases ◽  
Paired Samples ◽  
Sampling Sequence ◽  
New Moon

Activity of Microtus pennsylvanicus was recorded as the number of crossings per day over a sand transect during four consecutive summers. Appropriate samples were selected to test the effects of both moon phases and moonlight on activity. Initially the results of tests comparing new moon to full moon phases showed that the voles were more active during new moon in only 3 of 10 discreet paired samples tested. However, when the effects of sampling sequence, phenology of population growth, date at which moon phases occurred, and, finally, the effect of climate were all considered as factors which could have affected the above results, it seemed reasonable to conclude that the new moon phase tended to be associated with higher activity. To establish if moonlight by itself, independent of phases, was a factor affecting the activity, tests were made during brightest and darkest nights of the lunar month and results indicated that moonlight did not affect the differences in activity found in the moon phase tests.

scholarly journals Pola Pertumbuhan Kepiting Bakau (Scylla serrata) Di Perairan Desa Bandengan Kendal

2021 ◽  
Vol 10 (1) ◽  
pp. 14-22
Author(s):  
Nila Munana ◽  
Irwani Irwani ◽  
Widianingsih Widianingsih
Keyword(s):  
Growth Pattern ◽  
Full Moon ◽  
Carapace Width ◽  
Scylla Serrata ◽  
Moon Phases ◽  
Mangrove Crab ◽  
Exploratory Data ◽  
New Moon ◽  
Mangrove Crabs ◽  
Mud Crabs

Kepiting bakau (Scylla serrata) merupakan jenis kepiting yang banyak ditemukan di beberapa daerah, salah satunya di Perairan Desa Bandengan, Kendal. Kepiting bakau setiap harinya ditangkap oleh nelayan, keadaan ini dapat mempengaruhi terhadap populasi kepiting bakau. Fase bulan dapat memberikan pengaruh terhadap kepiting bakau, seperti pada tingkah laku kepiting bakau. Tujuan dari penelitian ini yaitu untuk mengetahui pola pertumbuhan kepiting bakau pada  fase bulan mati dan purnama di Perairan Desa Bandengan Kendal. Metode yang digunakan yaitu bersifat deskriptif eksploratif. Pengambilan data dilakukan sebanyak 6 kali periode pada 28 Desember 2019 – 9 Maret 2020, data dari kepiting bakau meliputi panjang karapas, lebar karapas, berat tubuh, jumlah kepiting bakau, dan parameter perairan. Jumlah kepiting bakau yang diperoleh selama penelitian sebanyak 212 ekor bulan mati dan 236 ekor bulan purnama. Hasil penelitian menunjukkan pola pertumbuhan kepiting bakau jantan bulan mati bersifat allometrik positif, sedangkan pada kepiting bakau betina bersifat allometrik negatif. Sedangkan, pada purnama 1 bersifat allometrik positif, bulan purnama 2 dan  bulan purnama 3 bersifat allometrik negatif, sedangkan kepiting bakau betina bersifat allometrik negatif. Mud crab (Scylla serrata) is a type of crab that is found in several areas, one of which is in the waters of Bandengan Village, Kendal. Every day mud crabs are caught by fishermen, this situation can affect the mangrove crab population. The moon phase can affect mud crabs, such as the behavior of mud crabs. The purpose of this study was to determine the growth pattern of mud crabs in the new moon and full moon phases in the waters of the village of Bandengan, Kendal. The method used is descriptive exploratory. Data collection was carried out 6 times during the period on 28 December 2019 - 9 March 2020, data from mud crabs included carapace length, carapace width, body weight, number of mangrove crabs, and water parameters. The number of mud crabs obtained during the study was 212 new moons and 236 full moons. The results showed that the growth pattern of male mud crabs in the new moon was positive allometric, while the female mud crabs were negative allometric. Meanwhile, full moon 1 is allometric positive, full moon 2, and full moon 3 allometric negatives, while female mud crabs are allometric negative.

scholarly journals Biologi Portunus pelagicus, Linnaeus, 1758 (Malacostraca : Portunidae) dari Perairan Jepara Ditinjau dari Distribusi Ukuran, Tingkat Kematangan Gonad, dan Pertumbuhan

2019 ◽  
Vol 8 (3) ◽  
pp. 223-228
Author(s):  
Ulfah Nur Hidayah ◽  
Ibnu Partikto ◽  
Irwani Irwani
Keyword(s):  
Sex Ratio ◽  
Full Moon ◽  
Economic Value ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Moon Phases ◽  
Width Distribution ◽  
New Moon ◽  
Internal And External Factors ◽  
Relationship Of

Rajungan (Portunus pelagicus) merupakan salah satu komoditi perikanan yang memiliki nilai ekonomis tinggi yaitu Rp. 70.000 – 90.000 /kg dan banyak diminati oleh masyarakat baik di dalam maupun luar negeri. Penurunan potensi sumberdaya rajungan (Portunus pelagicus) di beberapa perairan Indonesia mulai memprihatinkan. Hal tersebut dapat dihindari dengan memahami faktor-faktor internal dan eksternal yang berpengaruh pada sumberdaya rajungan. Penelitian ini bertujuan untuk mengetahui distribusi ukuran, nisbah kelamin dan tingkat kematangan gonad, hubungan panjang berat dan faktor kondisi, serta tingkat pertumbuhan rajungan berdasarkan fase bulan baru dan bulan purnama di Perairan Teluk Awur Jepara. Hasil penelitian distribusi ukuran lebar rajungan rata-rata 12,65 ± 1,335 pada bulan purnama dan 12,64 ± 1,259 cm pada bulan baru. Distribusi berat rata-rata 147,28 ±53,85 gram pada bulan purnama dan 146,65 ± 53,31 gram pada bulan baru. Distribusi tingkat kematangan gonad rajungan betina yaitu TKG 1 sebanyak 126 ekor, TKG 2 sebanyak 77 ekor, dan TKG 3 sebanyak 112 ekor sedangkan rajungan betina yang belum matang gonad 225 ekor. Nisbah kelamin rajungan jantan dan betina di Teluk Awur yaitu 0,9 : 1. Pola pertumbuhan rajungan di Teluk Awur yaitu bersifat allometrik negatif dimana pertumbuhan panjang karapas lebih dominan daripada pertumbuhan bobot tubuhnya. Sedangkan tingkat pertumbuhan rajungan untuk mencapai panjang maksimal yaitu 8,16 cm dengan koefisien pertumbuhan 0,6 per tahun. Blue Swimming Crab (Portunus pelagicus) is one of the fisheries commodity which has high economic value Rp. 70.000 – 90.000 /kg and is much in demand by the both domestic and foreign societies. The decrease of blue swimming crab (Portunus pelagicus) resource potential in some Indonesian waters is starting to apprehensive, that can be avoided by understanding the internal and external factors that influence the blue swimming crab resources. This research aimed to determine the size distribution, sex ratio and gonad maturity level, the relationship of length of weight and condition factor, and blue swimming crab growth rates according to the phase of the new moon and full moon in the Jepara Teluk Awur Waters. The results of the research of the width distribution of most crab in the full moon 12,65 ± 1,335  cm and 12,64 ± 1,259 in the new moon. The distribution of weight are 147,28 ±53,85 grams in the full moon and 146,65 ± 53,31 in the new moon phases. The distribution of maturity levels of female blue swimming crab gonads that is TKG 1 amounted 126 crabs, TKG 2 amounted 77 crabs, and TKG 3 amounted 112 crabs. While the female immature blue swimming crab were gonads 225. The sex ratio of male and female blue swimming crab in Teluk Awur is 0,9 : 1. The blue swimming crab growth pattern in Teluk Awur is negative allometric where the growth of carapace length is more dominant than the growth of its body weight. While the blue swimming crab growth rate to reach the maximum length is 8.16 cm with a growth coefficient of 0.6 per year. 

scholarly journals Fish Abundance In South Poigar Rivermouth South Minahasa

2020 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
Nuske Kamurahan ◽  
Nego E. Bataragoa ◽  
Anneke V. Lohoo
Keyword(s):  
Full Moon ◽  
High Tide ◽  
Moon Phase ◽  
Beach Seine ◽  
Moon Phases ◽  
Fish Weight ◽  
Total Fish ◽  
New Moon ◽  
The Individual ◽  
Swept Area

The objective of the study is to know the fish individual abundance and biomass in the mouth of Poigar River. The study employed swept area method, sampling was done at high tide and low tide of a new moon and full moon phase using a beach seine. The seine covered 2700 m2 at low tide and 900 m2 at high tide. The fish catches in both moon phases and tidal conditions consisted of 40 species of 25 families and 481 individuals. Total fish weight was 3,804 g. The individual abundance in the new moon was 0.0004/m2 – 0.1200/m2, and the biomass in the new moon was 0.0002 g/m2 – 0.5044 g/m2. The individual abundance in full moon was 0.0004/m2 – 0.0622/m2, and the biomass in full moon was 0.0002 g/m2-0.4017 g/m2. As a whole, both individual abundance and biomass in new moon and full moon at were 0.3922g/m2  and 2.7778 g/m2, respectively.Keywords: abundance, biomass, river poigar.AbstrakTujuan penelitian yaitu untuk mengetahui kelimpahan individu dan biomassa penelitian ini menggunakan metode (swept area), pengambilan sampel dilakukan saat air surut dan air pasang pada fase bulan baru dan bulan purnama dengan menggunakan pukat pantai. Luas daerah sapuan pukat pada periode surut 2700 m2 dan periode pasang 900 m2. Hasil tangkapan selama dua periode bulan saat air pasang maupun air surut sebanyak 40 spesies ikan dari 25 famili, 481 individu dan berat 3804. Ki bulan baru 0,0004/m2-0,1200/m2, Kb bulan baru 0,0002g/m2-0,5044g/m2. Ki bulan purnama 0,0004/m2-0,0622/m2, Kb bulan purnama 0,0002g/m2-0,4017. Secara keseluruhan kelimpahan individu dan biomassa pada fase bulan baru dan bulan purnama saat air surut dan pasang adalah Ki sebesar 0,3922/m2 sedangkan Kb sebesar 2,7778 g/m2.kata kunci: Kelimpahan, biomassa, sungai poigar

scholarly journals PENGARUH FASE BULAN TERHADAP WAKTU TEBAR PANCING DAN LAJU TANGKAP MADIDIHANG (Thunnus albacares Bonnaterre, 1788) PADA ARMADA RAWAI TUNA

2017 ◽  
Vol 22 (4) ◽  
pp. 207
Author(s):  
Irwan Jatmiko ◽  
Bram Setyadji ◽  
Arief Wujdi
Keyword(s):  
Full Moon ◽  
Yellowfin Tuna ◽  
Catch Rate ◽  
Lunar Phase ◽  
Anova Analysis ◽  
Tukey Test ◽  
Significant Difference ◽  
New Moon ◽  
One Way Anova ◽  
Tuna Longline

Madidihang/yellowfin tuna merupakan salah satu jenis ikan tuna ekonomis penting bagi industri perikanan di Indonesia dengan kontribusi hasil tangkapan yang terbanyak. Penelitian ini bertujuan untuk mengetahui pengaruh fase bulan terhadap waktu mulai tebar pancing dan laju tangkap madidihang pada armada rawai tuna. Pengumpulan data dilakukan oleh pemantau ilmiah pada armada rawai tuna yang sebagian besar berbasis di Pelabuhan Benoa, Bali mulai Agustus 2005 hingga Juni 2014. Daerah penangkapan ikan dari armada rawai tuna yang diambil datanya berada di lokasi (lintang dan bujur) 9°-16° LS hingga 109°-120° BT. Analisis anova satu arah dan tes Tukey dilakukan untuk mengetahui pengaruh fase bulan terhadap waktu mulai tebar pancing dan laju tangkap madidihang. Total sebanyak 60 trip dan 1.467 hari operasi penangkapan armada rawai tuna dilakukan dalam penelitian ini. Analisis statistik anova satu arah menunjukkan bahwa terdapat pengaruh yang nyata pada fase bulan terhadap waktu mulai tebar pancing (p<0,05). Selanjutnya, tes Tukey menunjukkan bahwa waktu mulai tebar pancing pada saat bulan purnama dimulai pada pukul 9:00 pagi hari. Waktu ini lebih lambat sekitar 2 jam dari pada waktu mulai tebar pancing pada ketiga fase bulan lainnya (perbani awal, perbani akhir dan bulan baru) yang dilakukan sekitar pukul 7:00 pagi hari. Analisis statistik anova satu arah juga menunjukkan terdapat perbedaan yang nyata antar fase bulan terhadap laju tangkap madidihang (p<0,05). Selanjutnya, tes Tukey menunjukkan bahwa laju tangkap pada saat bulan baru dan perbani awal sebesar 0,13 ekor/100 mata pancing atau lebih besar dibandingkan nilai laju tangkap pada saat purnama dan perbani akhir yang hanya sebesar 0,09 ekor/100 mata pancing. Yellowfin tuna is one of the most economically important species for fisheries industry in Indonesia. The objectives of this study are to investigate the effect of lunar phase to the set time start and catch rate of yellowfin tuna on tuna longline vessels. Data collected by scientific observer on tuna longline vessels mainly based in Benoa Port, Bali from August 2005 to June 2014. Fishing ground of sampled longline tuna located from 9°-16° S to 109°-120° E. One-way anova analysis and Tukey test conducted to examine the effect of lunar phase to the set time start and catch rate of yellowfin tuna. A total of 60 trips and 1,467 fishing days of longline tuna fishing vessels operation have been sampled for in this study. One-way anova analysis showed that there was a significant difference of lunar phase to the set time start (p<0.05). Furthermore, Tukey test showed that the starting time for setting during the full moon begins at 9:00 am. Its time was around 2 hours slower than the start of setting of the other three moon phase (first quarter, last quarter and new moon) which start around 7:00 am. One-way anova analysis also showed that there was a significant difference of lunar phase to catch rate of yellowfin tuna (p<0.05). Furthermore, Tukey test confirmed that hook rate on new moon and first quarter was 0.13/100 hooks or 0.4 bigger than hook rate on full moon and last quarter with only 0.09/100 hooks.

scholarly journals Lunar periodicity in catch rate and reproductive condition of adult eastern king prawns, Penaeus plebejus, in coastal waters of south-eastern Queensland, Australia

1996 ◽  
Vol 47 (1) ◽  
pp. 67 ◽  
Author(s):  
AJ Courtney ◽  
DJ Die ◽  
JG McGilvray
Keyword(s):  
Coastal Waters ◽  
Full Moon ◽  
Lunar Cycle ◽  
Catch Rate ◽  
Lunar Phase ◽  
Reproductive Condition ◽  
Ovary Weight ◽  
South Eastern ◽  
New Moon ◽  
Catch Rates

This study examined the lunar and die1 variation in catch rates and reproductive condition of adult eastern king prawns, Penaeus plebejus, in relatively deep (160 m) coastal waters off south- eastern Queensland. Females numerically dominated catches over most of the lunar cycle and constituted 76% of the weight of the catch. Analysis of variance (ANOVA) revealed an interaction between lunar phase and sex; catches peaked during Lunar Phase 3 (full moon � 3 days) and were particularly marked for males. This was the only period during the lunar cycle when the sex ratio approached 1 : 1. There was also an interaction between trawl-time and sex; male catch rates were at a minimum early in the evening, whereas female catch rates were at a maximum then and declined throughout the night. Trawler logbook catch rate data from the same area over a similar period indicated an interaction between lunar cycle and lunar phase. ANOVA revealed an effect of the interaction between phase and sex on the incidence of soft prawns; the incidence of soft males increased during Phase 4 (half moon waning to new moon � 3 days). Ovary weight also varied between phases and was higher during Phases 2 (half moon waxing to full moon � 3 days) and 4 (half moon waning to new moon � 3 days). Trends in the ovary weight and the incidence of histologically mature and ripe females suggested there are two periods of increased spawning activity during each lunar cycle. A cyclic regression fitted to the data explained 93% of the variation in the incidence of ripe females between samples. The influence of these cyclic trends in catch rate and reproductive condition should be considered when monitoring the spawning stock in the fishery and when planning sampling strategies in any future reproductive studies.

scholarly journals Correlation between the Lunar Phase and Tail-Lifting Behavior of Lizards (Pogona vitticeps) Exposed to an Extremely Low-Frequency Electromagnetic Field

Animals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 208 ◽  
Author(s):  
Tsutomu Nishimura ◽  
Harue Tada ◽  
Masanori Fukushima
Keyword(s):  
Magnetic Field ◽  
Full Moon ◽  
Low Frequency ◽  
Control Group ◽  
Lunar Phase ◽  
Extremely Low Frequency ◽  
K Index ◽  
Field Sensitivity ◽  
Pogona Vitticeps ◽  
New Moon

We previously showed that the agamid lizard Pogona vitticeps responded to an extremely low-frequency electromagnetic field (ELF-EMF; frequency: 6 and 8 Hz; peak magnetic field: 2.6 µT; peak electric field: 10 V/m) with tail-lifting behavior. In addition, the tail-lifting response to ELF-EMF disappeared when the parietal eyes of the lizards were covered by small round aluminum caps. This result suggests that the parietal eye contributes to light-dependent magnetoreception. In the present study, we set up an ELF-EMF group to evaluate the long-term effect of the ELF-EMF on lizards’ behavior and examine our hypothesis that exposure to ELF-EMFs increases the magnetic field sensitivity in lizards. We therefore include the lunar phase (full moon/new moon) and K index as environmental factors related to the geomagnetic field in the analysis. The number of tail lifts per individual per day was the response variable while calendar month, daily mean temperature, daily mean humidity, daily mean atmospheric pressure, full moon, new moon, and K index were the explanatory variables. We analyzed an ELF-EMF group and a control group separately. In a multiple linear regression analysis, the independent determinants associated with the number of tail lifts were the full moon, the temperature, February, March, April, and May in the ELF-EMF group and March, April, May, and June in the control group. The P. vitticeps in the ELF-EMF group responded to the full moon whereas those in the control group did not. In addition, in the ELF-EMF group, the number of tail lifts was higher on days when the K index was higher (P = 0.07) in the first period whereas there was no such tendency in either period in the control group. There is the possibility that the exposure to ELF-EMFs may increase magnetic-field sensitivity in lizards.

Effects of lunar phase on light trap catches of the Malayan black rice bug, Scotinophara coarctata (Heteroptera: Pentatomidae)

1993 ◽  
Vol 83 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Kiyomitsu Ito ◽  
Hachiro Sugiyama ◽  
Nik Mohd. Noor b. Nik Salleh ◽  
Chang Poon Min
Keyword(s):  
Full Moon ◽  
Light Trap ◽  
Physiological Status ◽  
Growth Stages ◽  
Lunar Phase ◽  
Starvation Period ◽  
Rice Bug ◽  
New Moon ◽  
Fat Bodies ◽  
Trap Catches

AbstractDaily light trap catches of Scotinophara coarctata (Thunberg) were analysed from mid-September 1986 to December 1990 and the physiological status of the trapped adults was examined. The catch size fluctuated synchronously with the lunar phase; large catches occurred around the full moon period and very few adults were trapped around the new moon period. Seasonally, the catches were large from January to March and from July to September, while they were small from May to June and October to November. The seasonal fluctuations of the catches seemed to be related to the growth stages of the rice plants on which the adults multiplied. The sex ratio of trapped adults was biased toward males, unlike that of the cage-reared insects which was 1:1. Most of the trapped females showed undeveloped ovaries and some of these females appeared to have oviposited previously. Light-attracted adults showed a considerable tolerance to starvation and survived for 20–30 days when they were given water, but for only two days in the absence of water. When the light-attracted females were supplied with food, their ovaries developed rapidly and females with mature eggs were produced after nine days. When the starvation period was prolonged, the ovaries remained immature and the fat bodies reduced in size. The nocturnal take-off of the adults was not triggered simply by the full moon illumination. Adult eclosion did not synchronize with the moon cycle.

Lunar Phase and Acting-Out Behavior

1986 ◽  
Vol 59 (2) ◽  
pp. 987-990 ◽  
Author(s):  
Mark W. Durm ◽  
Crispin L. Terry ◽  
Cathy R. Hammonds
Keyword(s):  
Mental Health ◽  
Psychiatric Hospital ◽  
Mental Health Professionals ◽  
Health Professionals ◽  
Full Moon ◽  
Lunar Phase ◽  
Acting Out ◽  
Moon Phase ◽  
Hospital Records

Psychiatric hospital records were used to ascertain whether acting-out behavior increases during the full moon phase. Acting-out behavior is identified as that which was dangerous to self or others to the extent that either seclusion or restraint was deemed necessary by qualified mental health professionals to prevent physical harm. Records in the seclusion/restraint log book of an Alabama hospital for 1982, 1983, and 1984 were used for the study. To ensure confidentiality no identification of subjects was made. This study, like many previous similar studies shows no significant increases during the full moon phase.

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