Length-Weight Relationship of Demersal Fish from the Eastern Coast of the Mouth of the Gulf of California

2010 ◽  
Vol 5 (6) ◽  
pp. 494-502 ◽  
Author(s):  
J.T. Nieto-Nava ◽  
M. Zetina- Rejon ◽  
F. Arreguin- Sanchez ◽  
N.E. Arcos- Huitron ◽  
E. Pena- Messina
Keyword(s):  
Gulf Of California ◽  
Demersal Fish ◽  
Eastern Coast ◽  
Weight Relationship ◽  
Relationship Of

Length‐weight relationship of six demersal fish species from Gulf of Mannar, Bay of Bengal, Eastern Indian Ocean

2021 ◽  
Author(s):  
Kannan Karuppiah ◽  
Sivaranjani Sekar ◽  
Kumar Rajendran ◽  
Karuppasamy Karuthapandian ◽  
Prabhu N. Marimuthu ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Fish Species ◽  
Bay Of Bengal ◽  
Demersal Fish ◽  
Eastern Indian Ocean ◽  
Gulf Of Mannar ◽  
Weight Relationship ◽  
Relationship Of

Dissolved oxygen and temperature best predict deep-sea fish community structure in the Gulf of California with climate change implications

2020 ◽  
Vol 637 ◽  
pp. 159-180
Author(s):  
ND Gallo ◽  
M Beckwith ◽  
CL Wei ◽  
LA Levin ◽  
L Kuhnz ◽  
...  
Keyword(s):  
Climate Change ◽  
Community Structure ◽  
Community Composition ◽  
Environmental Conditions ◽  
Deep Sea ◽  
Gulf Of California ◽  
Fish Community ◽  
Demersal Fish ◽  
Fish Community Structure ◽  
Explained Variance

Natural gradient systems can be used to examine the vulnerability of deep-sea communities to climate change. The Gulf of California presents an ideal system for examining relationships between faunal patterns and environmental conditions of deep-sea communities because deep-sea conditions change from warm and oxygen-rich in the north to cold and severely hypoxic in the south. The Monterey Bay Aquarium Research Institute (MBARI) remotely operated vehicle (ROV) ‘Doc Ricketts’ was used to conduct seafloor video transects at depths of ~200-1400 m in the northern, central, and southern Gulf. The community composition, density, and diversity of demersal fish assemblages were compared to environmental conditions. We tested the hypothesis that climate-relevant variables (temperature, oxygen, and primary production) have more explanatory power than static variables (latitude, depth, and benthic substrate) in explaining variation in fish community structure. Temperature best explained variance in density, while oxygen best explained variance in diversity and community composition. Both density and diversity declined with decreasing oxygen, but diversity declined at a higher oxygen threshold (~7 µmol kg-1). Remarkably, high-density fish communities were observed living under suboxic conditions (<5 µmol kg-1). Using an Earth systems global climate model forced under an RCP8.5 scenario, we found that by 2081-2100, the entire Gulf of California seafloor is expected to experience a mean temperature increase of 1.08 ± 1.07°C and modest deoxygenation. The projected changes in temperature and oxygen are expected to be accompanied by reduced diversity and related changes in deep-sea demersal fish communities.

Reproductive cycle and maternal-embryonic nutritional relationship of shovelnose guitarfishPseudobatos productusin the Gulf of California

2016 ◽  
Vol 90 (3) ◽  
pp. 889-905 ◽  
Author(s):  
A. E. Romo-Curiel ◽  
O. Sosa-Nishizaki ◽  
J. C. Pérez-Jiménez ◽  
M. C. Rodríguez-Medrano
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of California ◽  
Relationship Of

scholarly journals Population dynamics of the swimming crabs Callinectes (Portunidae) components of shrimp bycatch in the eastern coast of the Gulf of California

2014 ◽  
Vol 49 (1) ◽  
pp. 17-29 ◽  
Author(s):  
Juana López-Martínez ◽  
Leonor López-Herrera ◽  
J. Eduardo Valdez-Holguín ◽  
Carlos H Rábago-Quiroz
Keyword(s):  
Population Dynamics ◽  
Gulf Of California ◽  
Eastern Coast ◽  
Swimming Crabs

scholarly journals Length-weight relationship of greeneye fish (Chlorophthalmus agassizi) obtained from coast off Hatay (Northeast Mediterranean)

2015 ◽  
Vol 32 (4) ◽  
pp. 209-211
Author(s):  
Asiye Başusta ◽  
Metin Çalta ◽  
Tuncay Ateşşahin ◽  
Fatih Volkan Özel
Keyword(s):  
Weight Relationship ◽  
Relationship Of

scholarly journals FLUKTUASI BULANAN HASIL TANGKAPAN CANTRANG YANG BERBASIS DI PELABUHAN PERIKANAN PANTAI TEGAL SARI, KOTA TEGAL

2017 ◽  
Vol 15 (1) ◽  
pp. 69
Author(s):  
Tri Ernawati ◽  
Bambang Sumiono
Keyword(s):  
Demersal Fish ◽  
Catch Rate ◽  
Eastern Coast ◽  
Central Kalimantan ◽  
Fish Resources ◽  
Catch Composition

Penelitian mengenai perikanan cantrang yang berkaitan dengan sumber daya ikan demersal sebagai hasil tangkapan utama dilaksanakan selama tahun 2006 - 2007. Penelitian ini bertujuan untuk mengetahui fluktuasi bulanan hasil tangkapan cantrang yang berbasis di Pelabuhan Perikanan Pantai Tegal Sari. Metode yang digunakan adalah survei yang meliputi pengambilan contoh dari hasil tangkapan, pencatatan buku bakul dan statistik perikanan pelabuhan. Hasil penelitian menunjukkan bahwa jumlah trip armada cantrang periode 2006 - 2007 didominansi oleh kapal berukuran 21 - 30 GT. Produksi bulanan Pelabuhan Perikanan Pantai Tegal Sari dari tahun 2004 - 2007 berfluktuasi. Secara umum, produksi bulanan pada bulan Nopember 2005 - Desember 2006 jauh lebih tinggi dibanding pada bulan-bulan di tahun 2004 dan 2007. Hal ini karena dipengaruhi oleh fluktuasi jumlah trip dan perkembangan unit penangkapan. Komposisi hasil tangkapan cantrang tahun 2006 berdasarkan pada hasil pengambilan contoh, didominansi oleh ikan coklatan (Scolopsis taeniopterus) (22%), kuniran (Upeneus spp.) (17,4%), dan swangi atau demang (Priachantus sp.) (9,7%). Ratarata laju tangkap pada tahun 2006 dan 2007 berturut-turut 333,6 dan 424 kg/hari. Laju tangkap tahun 2006 cenderung, dipengaruhi oleh fluktuasi musiman, sedangkan laju tangkap tahun 2007 cenderung naik, tidak terpengaruh oleh fluktuasi musiman. Daerah penangkapan armada cantrang yang berbasis di Pelabuhan Perikanan Pantai Tegal Sari adalah di sekitar pantai timur Lampung, Tanjung Selatan (Kalimantan Selatan), dan Tanjung Puting (Kalimantan Tengah). The research on danish seine fishery related to demersal fish resources as the main catch was carried out from 2006 - 2007. The research aimed to know monthly fluctuation of the danish seine catch in Tegal Sari landing base. The survey was conducted by sampling the catch, recording data from retailer’s book and landing base statistic. The results showed that number of trip from 2006 - 2007 was dominated by 21 to 30 GT vessel. Monthly production in Tegal Sari landing base on 2004 to 2007 was fluctuated. Generally, monthly production on November 2005 - Desember 2006 was higher than other months on 2004 and 2007. It was caused by fluctuation of trips number and unit fishing developement. The catch composition in 2006 based on sampling result, was dominated by lattice monocle bream (Scolopsis taenipterus) (22%), goatfish (Upeneus spp.) (17.4%), and purple spotted bigeye (Priachantus spp.) (9.7%). Average of catch rate in 2006 and 2007 was 335.6 and 424 kg per day, respectively. The catch rate in 2006 danish seine, Tegal Sari tended to be influenced by season fluctuation. While catch rate in 2007 increased and was not influenced by season. Fishing grounds of danish seine fleet in Tegal Sari landing base were in eastern coast of Lampung waters, Tanjung Selatan (South Kalimantan) and Tanjung Puting (Central Kalimantan), respectively.

scholarly journals Length-Weight Relationship and Sex Ratio of Amblypharyngodon Mola in Dekar Haor of Sunamganj, Bangladesh

2018 ◽  
Vol 44 (2) ◽  
pp. 185-193
Author(s):  
PR Das ◽  
MS Uddin ◽  
MS Islam ◽  
M Biswas ◽  
MR Mia
Keyword(s):  
Sex Ratio ◽  
Freshwater Fish ◽  
Condition Factor ◽  
Correlation Coefficients ◽  
Male And Female ◽  
Positive Correlation ◽  
Average Ratio ◽  
Weight Relationship ◽  
R Value ◽  
Relationship Of

The study was carried out to determine length-weight relationship and sex ratio of a freshwater fish Amblypharyngodon mola (Hamilton 1822) collected from Dekar haor of Sunamganj district during the period of January to August 2017. A total of 2000 fishes were collected for the study and categorized these fishes into three groups namely males, females and combined sexes. Among 2000 mola 777 were male and 1223 were female. Length-weight equations and the correlation coefficients obtained for males, females and combined ones were: males Y = –1.97 + 3.00X, r = 0.883; females Y = –2.30 + 3.41X, r = 0.914 and combined Y = –2.11 + 3.16X, r = 0.904. Female’s A. mola attained more weight with the increases in length. Value of correlation coefficient ‘r’ was 0.883 for male and exhibited highly positive correlation between length and weight. On the contrary, ‘r’ value for female was 0.914 and it had also strongly positive correlation between length and weight relationships. Length-weight relationship of A. mola for male, female and combined sexes showed allometric pattern of growth. Condition factor ‘K’ for male, female and combined sexes was 1.09, 1.05 and 1.06, respectively and indicated better condition of fishes. The highest sex ratio (1 : 2.05) was found in May and the lowest (1 : 1.33) was in February. Dominance of females over males throughout the year was observed with an average ratio of male and female 1 : 1.57. Therefore, results of the study indicate that the existing hydrobiological conditions of the haor are conducive for food availability, free movement, feeding and better growth of the fish. Asiat. Soc. Bangladesh, Sci. 44(2): 185-193, December 2018

scholarly journals Observations on the age and growth of Varicorhinus damascinus (Val.) in Tigris river at Salahuldin province – Iraq

2008 ◽  
Vol 5 (2) ◽  
pp. 243-248
Author(s):  
Baghdad Science Journal
Keyword(s):  
Regression Coefficient ◽  
Age Groups ◽  
Age And Growth ◽  
Gill Nets ◽  
The Third ◽  
Weight Relationship ◽  
Tigris River ◽  
Straight Line ◽  
Males And Females ◽  
Relationship Of

Age and growth of Varicorhinus damascinus (Val.) in Tigris river at Salahuldin province have been investigated. Monthly samples were taken during the period from September 1999 to August 2000, using small-meshed gill nets. The age data showed that there were six age groups and the dominant age groups were (III – IV) for both sexes. The results of the present study revealed that the increment in length of V. damascinus at the sites of study showed a tendency to decrease with the increase in age, after the third year of life in both sexes. The length-weight relationship of males and females were calculated and demonstrated in a straight line logarithmic formula, as follows: Log W = 1.5404 + 2.6885 log L for males r = 0.95 (P > 0.05) Log W = 1.6723 + 2.7877 log L for females r = 0.77 (P > 0.05) The values of the regression coefficient (b) indicated that the growth of both sexes of V. damascinus was allometric..

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