Reproductive Biology of Oci Fish Selaroides leptolepis in Tomini Bay

Local people name Selaroides leptolepis distributed in Tomini Bay as Oci Fish. A study of the fish reproductive biology, which is one aspect of fisheries biology, is crucial to support the implementation of sustainable Oci Fish resource management policies. This study aims to determine the average length at first maturity, gonad maturity stages, and fecundity of the fish in Tomini Bay. Sampling was carried out using a stratified random sampling method from the catches of the fishermen landed in Fish Landing Base Kampung Tenda, Gorontalo City. The time interval sampling was conducted per month during April, May, and June 2020. Fish and egg samples preserved using ice cubes and a 10% formaldehyde solution correspondingly. The results of the study showed that the Oci Fish in Tomini Bay had a length range of the first maturity between 166 and 174 mm with a gonad maturity index ranging from 1.773 to 2.760%. The average fish fecundity was 16623 ± 4850 eggs.

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Reproductive biology of two deep-water sharks from the British Isles, Centroscymnus coelolepis and Centrophorus squamosus (Chondrichthyes: Squalidae)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531549800109x ◽

1999 ◽

Vol 79 (5) ◽

pp. 923-931 ◽

Cited By ~ 49

Author(s):

Marine Girard ◽

Marie-Henriette Du Buit

Keyword(s):

Reproductive Biology ◽

Deep Sea ◽

Average Length ◽

Sexual Stage ◽

British Isles ◽

The West ◽

Pregnant Females ◽

Stage Of Development ◽

First Maturity ◽

Size At First Maturity

The reproductive biology of two aplacental viviparous deep sea sharks, Centroscymnus coelolepis and Centrophorus squamosus has been studied from 1735 and 675 specimens respectively, collected with bottom trawls between 600 and 1400 m depth off the west coast of the British Isles. A macroscopic maturity scale indicates that for both species, size at first maturity is greater in females than in males. In Centroscymnus coelolepis, genital maturity occurs at an average length of ∼86 cm for males and ∼102 cm for females. In Centrophorus squamosus, males are mature near 98 cm and females near 124 cm total length (TL). Smallest juveniles of both species are absent from catches: no specimens of Centroscymnus coelolepis shorter than 58 cm, nor specimens of Centrophorus squamosus shorter than 84 cm have been recorded. Ovarian fecundity is higher in Centroscymnus coelolepis than in Centrophorus squamosus. A maternal supply has been demonstrated for Centroscymnus coelolepis. Litter size has been estimated only in C. coelolepis because no pregnant females of Centrophorus squamosus were recovered. A dwarf embryo and a pair of twins have been observed. Segregation by sexual stage of development shows that immatures are generally found at greater depths than adults.

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Overcoming Circumstances Caused by Jammer Using Time Interval / Sampling Method

International Journal Of Engineering And Computer Science ◽

10.18535/ijecs/v5i2.30 ◽

2016 ◽

Author(s):

D. Dhayalan ◽

◽

R. Preethi

Keyword(s):

Sampling Method ◽

Time Interval ◽

Interval Sampling

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ASPEK REPRODUKSI IKAN WADER IJO (OSTHEOCHILUS HASSELTI) DI DANAU RAWAPENING AMBARAWA, KABUPATEN SEMARANG

Management of Aquatic Resources Journal (MAQUARES) ◽

10.14710/marj.v6i1.19813 ◽

2018 ◽

Vol 6 (1) ◽

pp. 77-86

Author(s):

Muhammad Rizky Nugraha ◽

Anhar Solichin ◽

Boedi Hendrarto

Keyword(s):

Sampling Method ◽

Average Length ◽

Gonadosomatic Index ◽

Mesh Size ◽

Chi Square ◽

Gill Net ◽

Level Ii ◽

Mature Fish ◽

First Maturity ◽

Egg Diameter

ABSTRAK Ikan Wader Ijo (O. hasselti) merupakan ikan khas di Danau Rawapening. Populasinya saat ini diduga mengalami penurunan, akibat penangkapan ikan Wader Ijo yang sedang bertelur dan penggunaan alat tangkap dengan mesh size kecil. Penelitian ini bertujuan untuk mengetahui aspek reproduksi ikan Wader Ijo, faktor lingkungan dan mesh size gill net yang aman digunakan. Penelitian yang dilakukan bersifat deskriptif, dengan teknik pengambilan sampel acak. Penelitian dilaksanakan Juli - Agustus 2016 di Danau Rawapening. Sampel diperoleh 93 ekor menggunakan gill net mesh size 2 inchi, dengan panjang total 111 – 210 mm. Nisbah kelamin 1:6,75 dengan dominasi ikan betina. Sampel didominasi ikan matang gonad pada TKG IV. Berdasarkan analisa PCA, Ikan Wader Ijo pada TKG II, III dan IV memiliki korelasi negatif dengan pH, arus dan oksigen terlarut. Angka Indeks Kematangan Gonad tertinggi betina diperoleh 30,30%, sedangkan jantan 19,67%. Ikan Wader Ijo yang tertangkap belum mengalami recruitment overfishing karena ukuran ikan pertama kali matang gonad jantan 100,63 mm dan betina 110,90 mm lebih kecil dari ukuran rata-rata yang tertangkap153 mm. Fekunditas diperoleh 80.862 – 19.880 butir/individu. Berdasarkan analisa Regresi Power, fekunditas Wader Ijo dipengaruhi oleh panjang tubuhnya. Diameter telur yang diperoleh berkisar 0,01 – 1,01 mm. Berdasarkan analisa Chi-Square, bagian yang berbeda dalam ovarium memiliki hubungan dengan ukuran diameter telur. Mesh size gill net yang aman digunakan minimal berukuran 1,54 inchi. Kata Kunci : Wader Ijo; Aspek Reproduksi; Rawapening ABSTRACT Bonylip Barb (O. hasselti) is a local fish in Rawapening lake which population of this species in Rawapening already decrease, because of exploitation spawning Bonylip Barb and the used of fishing gear with small mesh size. This research aimed to know reproduction aspects of Bonylip Barb, environmental factors and mesh size of gill net. The method used in this research was descriptive with random sampling method. A total of 93 specimens were collected by gill net mesh size 2 inch from July to August 2016 at Rawapening. Specimens have total lenght 111 – 210 mm. Sex ratio was 1 : 6,75 dominated by female. Gonadal stage dominated by mature fish on level IV. Based on PCA analysis, gonadal stage level II, III and IV have negative correlations with pH, current and dissolved oxygen. The highest Gonadosomatic Index on female was 30,30%, while the male one was 19,67%. Length of first maturity not only male 100,63 mm but also female 110,90 mm smaller than average length of capture 155 mm, it means that Bonylip Barb in Rawapening still safe from recruitment overfishing. Fecundity ranged from 80.862 to 19.880 granules/individual. Based on power regression, fecundity was determined by the total length. Egg diameter ranged from 0,1 to 1,01 mm. Based on Chi-Square, different path of ovary have a corelation with egg diameter. Mesh size gill net that used in Rawapening was not recommended under 1,54 inch. Keywords: Bonylip Barb, Reproduction Aspect, Rawapening

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REPRODUCTION BIOLOGY OF GOLDBAND GOATFISH Upeneus moluccensis Bleeker, 1855 IN SUNDA STRAIT

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v8i2.15836 ◽

2017 ◽

Vol 8 (2) ◽

pp. 701

Author(s):

Herman Sarumaha ◽

Rahmat Kurnia ◽

Isdradjad Setyobudiandi

Keyword(s):

Reproductive Organs ◽

Maturity Stage ◽

Gonad Maturity ◽

Reproduction Biology ◽

Fish Samples ◽

Aquatic Resources Management ◽

First Maturity ◽

Biology Laboratory ◽

Fisheries Biology ◽

Size At First Maturity

This research was to analyze the reproduction biology of the goldband goatfish in the Sunda Strait as a reference for appropriate and sustainable management. Sampling was collected from April to August 2015. The samples from Sunda Strait were obtained from the fisherman yielded in the Coastal Fishing Port Labuan, Pandeglang, Banten Province. The sample was analyzed in Fisheries Biology Laboratory, Aquatic Resources Management Department, Fisheries and Marine Science Faculty, Bogor Agricultural University. Fish samples were measured, weighed and dissected, then morphologically observed for the reproductive organs. Samples obtained during the research were 811 specimen with the total length of 82-219 mm. Sex ratio among females and males were 1.5:1. The size at first maturity of females and males were 124 mm and 120 mm, respectively. Females were dominated by gonad maturity stage III and I, while for males dominated by gonad maturity stage I and II. Based on the composition of the TKG and IKG values each month, spawning season of the goldband goatfish in the Sunda Strait occurred in April and August. Fecundity obtained ranged 955-59.356 eggs with partial spawning type.

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REPRODUCTION BIOLOGY OF GOLDBAND GOATFISH Upeneus moluccensis Bleeker, 1855 IN SUNDA STRAIT

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v8i2.15836 ◽

2017 ◽

Vol 8 (2) ◽

pp. 701-711 ◽

Cited By ~ 1

Author(s):

Herman Sarumaha ◽

Rahmat Kurnia ◽

Isdradjad Setyobudiandi

Keyword(s):

Reproductive Organs ◽

Maturity Stage ◽

Gonad Maturity ◽

Reproduction Biology ◽

Fish Samples ◽

Aquatic Resources Management ◽

First Maturity ◽

Biology Laboratory ◽

Fisheries Biology ◽

Size At First Maturity

This research was to analyze the reproduction biology of the goldband goatfish in the Sunda Strait as a reference for appropriate and sustainable management. Sampling was collected from April to August 2015. The samples from Sunda Strait were obtained from the fisherman yielded in the Coastal Fishing Port Labuan, Pandeglang, Banten Province. The sample was analyzed in Fisheries Biology Laboratory, Aquatic Resources Management Department, Fisheries and Marine Science Faculty, Bogor Agricultural University. Fish samples were measured, weighed and dissected, then morphologically observed for the reproductive organs. Samples obtained during the research were 811 specimen with the total length of 82-219 mm. Sex ratio among females and males were 1.5:1. The size at first maturity of females and males were 124 mm and 120 mm, respectively. Females were dominated by gonad maturity stage III and I, while for males dominated by gonad maturity stage I and II. Based on the composition of the TKG and IKG values each month, spawning season of the goldband goatfish in the Sunda Strait occurred in April and August. Fecundity obtained ranged 955-59.356 eggs with partial spawning type.

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BIOLOGI REPRODUKSI IKAN TENGGIRI (Scomberomorus commerson Lacepede, 1800) DI PERAIRAN TELUK KWANDANG, LAUT SULAWESI

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.10.1.2018.69-84 ◽

2018 ◽

Vol 10 (1) ◽

pp. 69

Author(s):

Tegoeh Noegroho ◽

Thomas Hidayat ◽

Umi Chodriyah ◽

Mufti P Patria

Keyword(s):

Reproductive Biology ◽

Purse Seine ◽

Fish Length ◽

Maturity Stage ◽

Gonad Maturity ◽

Spanish Mackerel ◽

Significant Difference ◽

First Maturity ◽

Somatic Index ◽

Partial Spawner

Penelitian tentang aspek biologi tenggiri di Indonesia masih jarang dilakukan, padahal upaya pemanfaatannya telah lama dilakukan oleh nelayan. Ikan tenggiri di Teluk Kwandang penangkapannya dilakukan dengan alat tangkap purse seine dan pancing ulur. Data terkait biologi reproduksi ikan tenggiri di perairan Kwandang belum tersedia dengan baik, oleh sebab itu perlu dilakukan kajian yang lebih lengkap. Pelabuhan Perikanan Pantai Kwandang merupakan pelabuhan baru, sehingga informasi terkait perikanan tenggiri pada khususnya sangat bermanfaat dalam pendataan dan rencana pengelolaannya. Penelitian telah dilakukan pada Februari-Desember 2012 di perairan Teluk Kwandang, Kabupaten Gorontalo Utara, dengan tujuan mengkaji aspek perikanan meliputi struktur ukuran, panjang bertama kali tertangkap dan biologi reproduksi meliputi: Tingkat Kematangan Gonad, Gonado Somatic Index (GSI), nisbah kelamin, panjang pertama kali matang gonad, diameter dan jumlah telur. Dari penelitian ini diperoleh distribusi ukuran panjang ikan pada kisaran 25-138 cmFL, dengan rata-rata modus 60 cmFL. Panjang pertama kali tertangkap dengan purse seine dan pancing ulur masing-masing 64,7 cmFL dan 71,9 cmFL. Tingkat Kematangan Gonad ikan tenggiri didominasi oleh gonad belum matang 61,2%, dan kondisi matang gonad 38,8%. Puncak Gonado Somatic Index (GSI) terjadi pada bulan Mei, sehingga ikan tenggiri di Teluk Kwandang diduga memijah pada Mei-Juli. Nilai GSI mencapai puncaknya pada panjang ikan 98 cm, dan akan turun pada panjang ikan lebih dari 100 cm. Dari hasil uji chi-square diketahui terdapat perbedaan yang nyata antara jumlah ikan tenggiri jantan dan betina. Panjang pertama kali matang gonad ikan tenggiri adalah 80,4 cm, pada kisaran 79,3-81,6 cm. Jumlah telur ikan tenggiri berkisar antara 417.360-9.476.520 butir pada panjang ikan 65-103 cmFL. Berdasarkan perkembangan diameter telur setiap bulan menunjukkan tipe pemijahan ikan tenggiri adalah asynchronous dengan pola pemijahan partial spawner. Study on biological aspects of spanish mackerel in Indonesia still rarely, whereas the utilization efforts have been done by fishermen. Spanish mackerel in Kwandang Bay are caught with a purse seine and handline. The data related to reproductive biology of mackerel fish in Kwandang waters is not yet available properly, therefore a more complete study needs to be done. Kwandang is a new port, so the information related to Spanish mackerel in particular is very useful in data collection and management plan. The study was conducted in February-December 2012 at Kwandang Bay water, North Gorontalo regency. With the aim of assessing the fishery aspects include the size structure, the length at first captured and reproductive biology aspects such as gonad maturity stage, Gonado Somatic Index (GSI), sex ratio, length at first maturity, number and diameter of oosit. From this research, the fish ditributions between range of 25-138 cmFL, with average mode 60 cmFL. The length at first capture caught with purse seine and handline respectively 64.7 cmFL and 71.9 cmFL. The gonad maturity stage of the catched spanish mackerel was dominated by 61.2% of immature and 38.8% of mature gonad. Gonado Somatic Index (GSI) peak was reached in May, and from this GSI value it is concluded that the Spanish mackerel spawned in May-July. The maximum GSI reached at fish length of 98 cm and decreased at fish length exceeded 100 cm. There was significant difference between the male and female of spanish mackerel. Length at first maturity of the gonad was approximately 80,4 cm, within the size range of 79.3-81.6 cmFL. The number of spanish mackerel oosit ranged between 417.360-9.476.520, with size ranged between 65-103 cmFL. Observed monthly fluctuations of oosit diameter lead to a conclusion that spawning type of spanish mackerel was asynchronous with partial spawner spawning pattern.

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Assessing early unplanned reoperations in neurosurgery: opportunities for quality improvement

Journal of Neurosurgery ◽

10.3171/2014.9.jns14666 ◽

2015 ◽

Vol 123 (1) ◽

pp. 198-205 ◽

Cited By ~ 16

Author(s):

Nancy McLaughlin ◽

Peng Jin ◽

Neil A. Martin

Keyword(s):

Quality Improvement ◽

Quality Indicator ◽

Outpatient Surgery ◽

Care Delivery ◽

Average Length ◽

Medical Center ◽

Postoperative Bleeding ◽

Time Interval ◽

Neurosurgical Procedures ◽

Neurosurgical Department

OBJECT Review of morbidities and mortality has been the primary method used to assess surgical quality by physicians, hospitals, and oversight agencies. The incidence of reoperation has been proposed as a candidate quality indicator for surgical care. The authors report a comprehensive assessment of reoperations within a neurosurgical department and discuss how such data can be integrated into quality improvement initiatives to optimize value of care delivery. METHODS All neurosurgical procedures performed in the main operating room or the outpatient surgery center at the Ronald Reagan UCLA Medical Center and UCLA Santa Monica Medical Center from July 2008 to December 2012 were considered for this study. Interventional radiology and stereotactic radiosurgery procedures were excluded. Early reoperations within 7 days of the index surgery were reviewed and their preventability status was evaluated. RESULTS The incidence of early unplanned reoperation was 2.6% (occurring after 183 of 6912 procedures). More than half of the patients who underwent early unplanned reoperation initially had surgery for shunt-related conditions (34.4%) or intracranial tumor (23.5%). Shunt failure was the most common indication for early unplanned reoperation (34.4%), followed by postoperative bleeding (20.8%) and postoperative elevated intracranial pressure (9.8%). The average time interval (± SD) between the index surgery and reoperation was 3.0 ± 1.9 days. The average length of stay following reoperation was 12.1 ± 14.4 days. CONCLUSIONS This study enabled an in-depth assessment of reoperations within an academic neurosurgical practice and identification of strategic opportunities for department-wide quality improvement initiatives. The authors provide a nuanced discussion regarding the use of absolute reoperations as a quality indicator for neurosurgical patient populations.

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Online Doppler Effect Elimination Based on Unequal Time Interval Sampling for Wayside Acoustic Bearing Fault Detecting System

Sensors ◽

10.3390/s150921075 ◽

2015 ◽

Vol 15 (9) ◽

pp. 21075-21098 ◽

Cited By ~ 5

Author(s):

Kesai Ouyang ◽

Siliang Lu ◽

Shangbin Zhang ◽

Haibin Zhang ◽

Qingbo He ◽

...

Keyword(s):

Doppler Effect ◽

Time Interval ◽

Bearing Fault ◽

Interval Sampling

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Reproductive biology of Haemulon plumieri (Teleostei: Haemulidae) in Ceará state, Northeastern Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842013000200020 ◽

2013 ◽

Vol 73 (2) ◽

pp. 391-396 ◽

Cited By ~ 7

Author(s):

RA Shinozaki-Mendes ◽

J Santander-Neto ◽

JRF Silva ◽

FHV Hazin

Keyword(s):

Reproductive Biology ◽

Fishing Effort ◽

Northeastern Brazil ◽

Tropical Species ◽

Stock Management ◽

Western Atlantic ◽

Total Fecundity ◽

Maturation Stages ◽

First Maturity ◽

Management And Conservation

The Haemulon plumieri is a typical reef-associated and tropical species found in warm and temperate waters of the Western Atlantic. Due to the large fishing effort directed to H. plumieri, the knowledge about its reproductive biology is essential for correct stock management and conservation. The aim of this study was to characterise reproductive biology with a focus on its seasonal variation of gonadal maturation stages, first maturation size and fecundity. Specimens were monthly collected and a total of 119 females and 136 males were analysed. The reproductive cycle of Haemulon plumieri is seasonal, with higher activity between March and May. Size at first maturity (L50) was estimated at 16.86 and 18.55 cm for females and males, respectively. The total fecundity ranged between 17,816 and 120,333 mature oocytes per female and relative fecundity was 235 ± 63 oocyte.g−1 whereas batch fecundity varied between 20 and 25% from total fecundity. Since the species is widely caught, we suggest a closed season from March to May and to establish a minimum catch size of 18.5 cm for both sexes, since there is no evident sexual dimorphism.

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ASPEKBIOLOGI IKANKURISI (Nemipterus japonicus) DI PERAIRANTELUKBANTEN

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.8.1.2016.21-28 ◽

2016 ◽

Vol 8 (1) ◽

pp. 21

Author(s):

Selvi Oktaviyani ◽

Mennofatria Boer ◽

Yonvitner Yonvitner

Keyword(s):

Fisheries Management ◽

Average Length ◽

Maturity Stage ◽

Allometric Growth ◽

Fishing Activity ◽

Fish Resources ◽

Nemipterus Japonicus ◽

Males And Females ◽

Biological Aspects ◽

First Maturity

Ikan kurisi (Nemipterus japonicus) merupakan salah satu sumber daya ikan ekonomis penting di Perairan Teluk Banten dan banyak didaratkan di Pelabuhan Perikanan Nusantara (PPN) Karangantu, Banten. Intensitas penangkapan yang tinggi akan menyebabkan tangkap lebih (overfishing), sehingga mengancam kelestarian ikan kurisi. Penelitian ini bertujuan untuk mengetahui beberapa aspek biologi ikan kurisi di Perairan Teluk Banten, seperti struktur ukuran panjang, rasio kelamin, hubungan panjang berat, tingkat kematangan gonad, ukuran panjang rata-rata tertangkap (Lc) dan ukuran pertama kali matang gonad (Lm). Informasi yang diperoleh dapat menjadi bahan pertimbangan dalam kegiatan pengelolaan perikanan. Lokasi pengambilan contoh dilakukan di Pelabuhan Perikanan Nusantara (PPN) Karangantu, Banten dari bulan Mei hingga Agustus 2012. Hasil penelitian menunjukkan bahwa ukuran panjang total ikan kurisi berkisar antara 98 dan 211 mm. Perbandingan kelamin jantan dan betina dalam keadaan seimbang dan memiliki pola pertumbuhan allometrik negatif yang menunjukkan pertumbuhan panjang lebih cepat dibandingkan pertumbuhan beratnya. Lebih dari 50% ikan-ikan yang diamati baik jantan maupun betina selama bulan pengamatan belum matang gonad (immature). Ukuran pertama kali matang gonad adalah 196 mm sedangkan ukuran panjang rata-rata tertangkap adalah 146 mm. Banyaknya ikan yang tertangkap dalam ukuran kecil (kurang dari panjang pertama kali matang gonad) akan mengganggu kelestarian ikan kurisi. Japanese threadfin bream (Nemipterus japonicus) is one of the most important economical fish resources in the Gulf of Banten and many landed at Archipelago Fishing Port (PPN) of Karangantu. High intensity of fishing activity can cause an overfihing, and threat sustainability of japanese threadfin bream. The research was aimed to determine some biological aspects of japanese threadfin bream in the Gulf of Banten, such as structure of the length, sex ratio, length-weight relationship, gonad maturity stage, the average length of captured (Lc) and the length of first maturity (Lm). It is believed that the collected information can be taken into consideration in the fisheries management activities. The sample was collected at PPN Karangantu, Banten from May to August 2012. The result showed that the length of this fish ranged between 98 and 211 mm. Ratio of male and female is balance and have negative allometric growth pattern show that the length of growth is more faster than the weight of growth. More than 50% of fish sample both males and females were immature gonads. During observation, length of first maturity was 196 mm and the average length of captured was 146 mm. Many fishes caught was smaller than Lm, It will interfere the sustainability of japanese threadfin bream.

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