Plankton population and physico-chemical properties of a lake of Jahangirnagar University campus, Bangladesh at various lunar rhythms

Planktonic biomass and physico-chemical properties of water from a lake at Jahangirnagar University, Bangladesh were studied during new moon, first quarter, full moon and last quarter phases from 16th June to 15th July 2015. Twenty four species of phytoplankton belonging to Chlorophyceae, Bacillariophyceae and Euglenophyceae were recorded. Maximum abundance (162-301 unit/l) of Chlorophyceae was recorded in first quarter phase followed by full moon phase (112-224 unit/l), new moon phase (85-222unit/l) and last quarter phase (60-125 unit/l), respectively. Chlorella vulgaris and Biddulphia aurita were the most abundant phytoplankton throughout the lunar period. Among the zooplankton, 5 species of Protozoa, 2 species of Rotifer, 3 species of Cladocera and 1 species of Ostracoda were recorded. Highest zooplankton was recorded in full moon phase (54-105 unit/l) and Daphnia cephalata was the most abundant species throughout the lunar cycle. Physico-chemical parameters indicate that the water temperature, colour, odour and pH were almost similar throughout the lunar cycle, whereas maximum dissolved oxygen (7.16 mg/l) and minimum (4.43 mg/l) were found during the last quarter and the full moon phase, respectively. The highest content of free carbon dioxide (4.36 mg/l) and chloride (22.8 mg/l) were recorded during first quarter and full moon phase accordingly.Jahangirnagar University J. Biol. Sci. 4(2): 31-36, 2015 (December)

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Moonlight is a key entrainer of lunar clock in the brain of the tropical grouper with full moon preference

BMC Zoology ◽

10.1186/s40850-020-00060-8 ◽

2020 ◽

Vol 5 (1) ◽

Author(s):

Kodai Fukunaga ◽

Fumika Yamashina ◽

Yuki Takeuchi ◽

Chihiro Yamauchi ◽

Akihiro Takemura

Keyword(s):

Pituitary Gland ◽

Full Moon ◽

Clock Genes ◽

Lunar Cycle ◽

Moon Phase ◽

Transcript Levels ◽

New Moon ◽

Cycle Dependent ◽

Honeycomb Grouper ◽

Reproductive Cycles

Abstract Background Many animals in coral reefs exhibit lunar cycles in their reproduction, showing synchronous gametogenesis and spawning at a particular moon phase. How these lunar reproductive cycles are endogenously regulated remains unknown, although changes in moonlight between the new moon and full moon are likely involved in this rhythmic event. Results This study evaluated the possible role of cryptochrome (cry1, cry2, cry3) in phase shifting and setting in the honeycomb grouper Epinephelus merra, which is a typical lunar spawner with full moon preference. qPCR analysis revealed that when fish were reared under alternating light-dark conditions, the transcript levels of cry1 and cry2, but not of cry3, in the diencephalon and pituitary gland showed daily variations. Weekly collection at midnight showed increases in the transcript levels of cry1 and cry2 in the diencephalon, but not the pituitary gland, from the first quarter moon through the last quarter moon. In comparison to the new moon, these transcript levels were significantly lower at all other sampling times. The artificial full moon conditions for 1 month resulted in increased cry transcript levels in both tissues at 2 (cry1) or 2 and 4 (cry2) weeks after the initiation of full moon conditions. Conclusions These results indicate the importance of transient changes in “brightness at night” in the response to moonlight for the phase shift and of “darkness at night” during the new moon for the phase set to the determined moon phase. We concluded that the moon phase-dependent oscillation of clock genes plays a role in lunar cycle-dependent behaviors in fish.

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Lunar Cycle Influences Reproductive Performance of Crossbred Brahman Cows Under Tropical Conditions

Journal of Biological Rhythms ◽

10.1177/0748730420983638 ◽

2021 ◽

pp. 074873042098363

Author(s):

Alejandro A. Aguirre ◽

Roberto A. Palomares ◽

Aitor D. De Ondiz ◽

Eleazar R. Soto ◽

Mariana S. Perea ◽

...

Keyword(s):

Reproductive Performance ◽

Full Moon ◽

Lunar Cycle ◽

The Moon ◽

Crossbred Cows ◽

Lunar Phases ◽

Tropical Conditions ◽

Service Conception ◽

New Moon ◽

Postpartum Estrus

Evidence has accumulated over the years indicating that the moon influences some aspects of the reproductive activity in animals and humans. However, little is known about the influence of the lunar cycle on the reproductive performance of cows under tropical conditions, where the environment strongly affects reproduction. This retrospective study was conducted with the aim of assessing the influence of the lunar cycle on some reproductive traits of tropical crossbred cows managed in a pasture-based system. Data from 5869 reproductive records from two commercial farms localized in the Maracaibo Lake Basin of Zulia State, Venezuela, were analyzed. Variables studied were first service conception rate, calving frequency, first postpartum estrous frequency, and pregnancy frequency. In addition to the lunar cycle, the effects of farm, season, and predominant breed were also considered. Data were analyzed using logistic regression and general linear model from SAS. First service conception was affected by lunar phases and predominant breed, but not by farm or season. For frequencies of calving, first postpartum estrus, and pregnancy, there was no main effect of farm, season, and predominant breed, whereas the effect of lunar phases was highly significant. First service conception was significantly greater in waning than in crescent phase of the lunar cycle. Frequencies of calving, first estrus, and pregnancy were highly correlated and showed greater figures around full moon and new moon. In conclusion, lunar cycle influenced first service conception, attaining greater values in the waning phase of the moon cycle. Frequencies of calving, first postpartum estrus, and pregnancy in crossbred cows showed a clear bimodal rhythm, whose greatest values coincided with new moon and full moon.

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

Marine and Freshwater Research ◽

10.1071/mf9960067 ◽

1996 ◽

Vol 47 (1) ◽

pp. 67 ◽

Cited By ~ 21

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.

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Diversity of scorpions (Chelicerata: Arachnida) in the Atlantic Forest in Pernambuco, northeastern Brazil

Check List ◽

10.15560/10.6.1331 ◽

2014 ◽

Vol 10 (6) ◽

pp. 1331 ◽

Cited By ~ 10

Author(s):

André Felipe de Araujo Lira ◽

Cleide Maria Ribeiro de Albuquerque

Keyword(s):

Atlantic Forest ◽

Abundant Species ◽

Northeastern Brazil ◽

Forest Fragments ◽

Moon Phase ◽

The Family ◽

New Moon ◽

Important Center ◽

Uv Lamps ◽

Northeastern Atlantic

This study was conducted to measure the biodiversity of scorpion species in the remnants of the Brazilian northeastern Atlantic Forest, an important center of biodiversity and endemism. Collections were performed in twelve forest fragments in Sirinhaém municipality, Pernambuco State, through active searches at night by using UV lamps between 19:00h and 21:00h during the new moon phase in December 2012 and January 2013. A total of 1,125 specimens from two genera and five species were collected: Tityus pusillus Pocock, 1893; Ananteris mauryi Lourenço, 1982; Tityus brazilae Eickstedt & Lourenço, 1984; Tityus neglectus Mello-Leitão, 1932; and Tityus stigmurus (Thorell, 1876), all belonging to the family Buthidae C.L. Koch, 1837. The most abundant species was T. pusillus (90.7%), followed by A. mauryi (7.1%). Tityus brazilae, T. neglectus, and T. stigmurus together represented less than 3% of the individuals sampled.

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TIMING OF LARVAL RELEASE BY REEF CORAL Pocillopora damicornis AT PANJANG ISLAND, CENTRAL JAVA

Marine Research in Indonesia ◽

10.14203/mri.v33i1.458 ◽

2018 ◽

Vol 33 (1) ◽

pp. 33-39 ◽

Cited By ~ 2

Author(s):

Munasik ◽

Suharsono ◽

J. Situmorang ◽

H. N. Kamiso

Keyword(s):

Full Moon ◽

Reef Coral ◽

Lunar Cycle ◽

Tidal Range ◽

Pocillopora Damicornis ◽

Larval Release ◽

Double Peaks ◽

Central Java ◽

New Moon ◽

Peak Release

Monthly larval release by the coral Pocillopora damicornis at Panjang Island, Central Java was investigated. Corals were collected from windward and leeward and maintained in outdoor, flow-trough system to quantify nightly release of larvae. Larval release of the coral occurs every month throughout the year, and its planulation increased during dry monsoon. Monthly planulation occurs from new moon to full moon and possesses in different pattern between single and paired colonies. Planulation in paired colonies occurred in single peak and more synchronized in each colony however single colonies planulated in double peaks and less synchronized in each colony. This study confirmed that planulation period of P. damicornis at Panjang Island over a range of lunar phases with shorter periods of peak release which predominantly controlling by tidal range rather than lunar cycle.

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Diversity and density of Collembola as influenced by soil physico-chemical properties in fallow land ecosystem of Assam, India

Journal of Environmental Biology ◽

10.22438/jeb/41/6/si-229 ◽

2020 ◽

Vol 41 (6) ◽

pp. 1626-1631

Author(s):

S. Bhagawati ◽

◽

B. Bhattacharyya ◽

B.K. Medhi ◽

S. Bhattacharjee ◽

...

Keyword(s):

Soil Moisture ◽

Organic Carbon ◽

Population Analysis ◽

Chemical Properties ◽

Abundant Species ◽

Diversity Indices ◽

Organic Carbon Content ◽

Fallow Land ◽

Physico Chemical ◽

Variation Patterns

Aim: To investigate the influence of soil physico-chemical properties on diversity and density of Collembola in an undisturbed fallow land ecosystem. Methodology: Soil sampling was done at monthly intervals to explore the diversity, density and seasonal variation patterns of collembolan population in a fallow land ecosystem during March, 2015 to February, 2016. Collembolans were sampled using Tullgren funnel and identified by standard taxonomic keys. Finally, correlation studies were conducted to assess the influence of different soil physico-chemical properties on diversity and density of collembolans. Results: Five species of Collembola (Cyphoderus sp., Entomobrya sp., Isotoma sp., Folsomia sp. and Hypogastrura sp.) belonging to 4 families (Cyphoderidae, Entomobryidae, Isotomidae and Hypogastruridae) were identified. Cyphoderus sp. was recorded to be the most abundant species contributing 44.29 percent of population. Analysis of different diversity indices revealed higher diversity of collembolans during summer, indicating the presence of relatively stable habitats as compared to other seasons. Summer season also recorded highest density of Collembola. During all the seasons studied, a strong significant positive correlation (P<0.05 and P<0.01) of collembolan population was registered with soil moisture and organic carbon, respectively, however, remaining edaphic factors registered non-significant relationship with the collembolan density and diversity Interpretation: The study clearly indicated that the soil moisture and organic carbon content had a positive relationship with collembolan population and provides a relatively favourable ecological niche for their assemblages.

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Reproductive phenology across the lunar cycle: parental decisions, offspring responses, and consequences for reef fish

10.26686/wgtn.13012961 ◽

2020 ◽

Author(s):

Jeffrey Shima ◽

CW Osenberg ◽

SH Alonzo ◽

EG Noonburg ◽

P Mitterwallner ◽

...

Keyword(s):

Reef Fish ◽

Egg Production ◽

Life History Theory ◽

Environmental Changes ◽

Full Moon ◽

Lunar Cycle ◽

Adaptive Plasticity ◽

Birth Date ◽

Reproductive Phenology ◽

New Moon

© 2020 by the Ecological Society of America Most organisms reproduce in a dynamic environment, and life-history theory predicts that this can favor the evolution of strategies that capitalize on good times and avoid bad times. When offspring experience these environmental changes, fitness can depend strongly upon environmental conditions at birth and at later life stages. Consequently, fitness will be influenced by the reproductive decisions of parents (i.e., birth date effects) and developmental decisions (e.g., adaptive plasticity) of their offspring. We explored the consequences of these decisions using a highly iteroparous coral reef fish (the sixbar wrasse, Thalassoma hardwicke) and in a system where both parental and offspring environments vary with the lunar cycle. We tested the hypotheses that (1) reproductive patterns and offspring survival vary across the lunar cycle and (2) offspring exhibit adaptive plasticity in development time. We evaluated temporal variation in egg production from February to June 2017, and corresponding larval developmental histories (inferred from otolith microstructure) of successful settlers and surviving juveniles that were spawned during that same period. We documented lunar-cyclic variation in egg production (most eggs were spawned at the new moon). This pattern was at odds with the distribution of birth dates of settlers and surviving juveniles—most individuals that successfully survived to settlement and older stages were born during the full moon. Consequently, the probability of survival across the larval stage was greatest for offspring born close to the full moon, when egg production was at its lowest. Offspring also exhibited plasticity in developmental duration, adjusting their age at settlement to settle during darker portions of the lunar cycle than expected given their birth date. Offspring born near the new moon tended to be older and larger at settlement, and these traits conveyed a strong fitness advantage (i.e., a carryover effect) through to adulthood. We speculate that these effects (1) are shaped by a dynamic landscape of risk and reward determined by moonlight, which differentially influences adults and offspring, and (2) can explain the evolution of extreme iteroparity in sixbars.

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

Journal of Marine Research ◽

10.14710/jmr.v8i2.25104 ◽

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.

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Composition, density and biomass of fish community from the surf zone as a function of the lunar cycle at Miramar Beach in Cabedelo, Paraíba

Neotropical Ichthyology ◽

10.1590/1982-0224-20170042 ◽

2019 ◽

Vol 17 (2) ◽

Cited By ~ 1

Author(s):

Willy Vila Nova Pessoa ◽

Jonas de Assis Almeida Ramos ◽

Paulo Guilherme Vasconcelos de Oliveira

Keyword(s):

Surf Zone ◽

Abundant Species ◽

Lunar Cycle ◽

Species Group ◽

Biological Interactions ◽

The Moon ◽

Group I ◽

The Mean ◽

New Moon ◽

Density And Biomass

ABSTRACT The influence of the moon cycles on the ichthyofauna has been little studied in the surf zone. In this study, the number of species, density and biomass were evaluated as a function of the moon. A total of 49 species distributed in 24 families were captured in two areas of Miramar beach. The mean density was significant high in the weaning and low in the new moon, while density and biomass together showed differences for areas. The most abundant species were Anchoa tricolor and Trachinotus falcatus (new moon), and Anchovia clupeoides showed significant differences in the waning moon. The RDA indicates that turbidity influenced significantly the presence of two species group. The group I were represented by Stellifer brasiliensis, Trachinotus goodei, A. clupeoides, Chilomycterus spinosus and Conodon nobilis that occurred on the waning and new phases in both areas, while the group II were represented by Polydactylus virginicus and Haemulopsis corvinaeformis in the full moon. The surf zones may also be strongly governed by the lunar phases. Therefore, the results found in this study, showed that the biological interactions between the species with turbidity and moon might explain the density and biomass variations for some species in the surf zone.

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Physico-chemical Attributes Study from Different Sources of Freshwater Bodies in and around Barishal University Campus, Barishal, Bangladesh

Current Environment ◽

10.54479/ce.v1i01.6661 ◽

2021 ◽

Vol 1 (01) ◽

pp. 21-26

Author(s):

AFROJA NASRIN

Keyword(s):

Surface Water ◽

Water Temperature ◽

Chemical Properties ◽

University Campus ◽

Surface Water Temperature ◽

Physico Chemical ◽

Freshwater Bodies ◽

Water Ph ◽

Chemical Attributes ◽

Different Sources

This study measured surface water temperature, water pH, TDS, EC, DO, nitrate, ammonium, sulphate and DIP as water physico-chemical properties of four freshwater reservoirs from Barishal Sadar upozilla. The surface water temperature was recorded highest (22.4 °C) in station 4 and loest was in station 1. Water pH, nitrate, ammonium and sulphate showed almost same results among the four reservoirs. TDS and EC values range from 188 to 215 mg/l and 195 to 225 µS/cm, respectively. DO level was almost similar in all the stations except station 1 which showed comparatively lowest amount (4.55 mg/l). DIP ranges from 3.20 to 4.15 mg/l. Among the four reservoirs, comparatively newly established BU pond (station 4) showed poor results than the others.

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