scholarly journals Length-weight relationship and certain biological aspects of the Indian white shrimp Fenneropenaeus indicus (H. Milne Edwards, 1837) exploited by trawls in the Arabian Sea off Kerala coast, India

2017 ◽  
Vol 64 (4) ◽  
Author(s):  
S. Lakshmi Pillai ◽  
E. V. Radhakrishnan ◽  
G. Maheswarudu ◽  
M. Radhakrishnan
Keyword(s):  
Sex Ratio ◽  
Arabian Sea ◽  
White Shrimp ◽  
Male And Female ◽  
Weight Relationship ◽  
Total Length ◽  
Fenneropenaeus Indicus ◽  
Kerala Coast ◽  
Trawl Fishing ◽  
Biological Aspects

Length-weight relationship (LWR), sex ratio and maturity of Fenneropenaeus indicus (H. Milne Edwards, 1837), was analysed based on samplings from coastal trawl fishing grounds in the Arabian Sea off Kerala coast, India. The male tofemale ratio (1:1.27) did not vary significantly from the hypothetical 1:1 ratio. Length at maturity (Lm50) was estimated at 122 mm total length for females. The LWR did not differ significantly between male and female shrimps. The information generated from this study will enhance knowledge on the biology of the species and assist in assessment and management of its stock.

scholarly journals Hubungan panjang bobot dan faktor kondisi ikan wader bintik dua Barbodes binotatus (Valenciennes, 1842) di Sungai Barambai Samarinda Kalimantan

2019 ◽  
Vol 18 (2) ◽  
pp. 87 ◽  
Author(s):  
. Jusmaldi ◽  
Nova Hariani
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Mean Value ◽  
Male And Female ◽  
Weight Relationship ◽  
Total Length ◽  
East Kalimantan ◽  
Fish Samples

Biology of the spotted barb Barbodes binotatus (Valenciennes, 1842) in Barambai River, east Kalimantan is unknown. This study aimed to analyses sizes of fish, sex ratio, length-weight relationship and condition factor of the spotted barb. A total of 347 fish samples were collected by several gears in Barambai River from August to October 2017. The results of this research showed that the total length of the fish ranged from 45.67 to 146.01 mm and weight ranged from 1.27-43.34 g. The sex ratio of male and female were 1:1.12. The length-weight equations for males was W = 1x10-5 L3.063, W = 8x10-6L3.108 for females, and W = 9 x 10-6 L3.091 for both sexes. The condition factor (K) for the spotted barb was ranged between 0.826 – 2.214 with mean value of 1.163.  AbstrakBiologi ikan wader bintik dua Barbodes binotatus (Valenciennes, 1842) di Sungai Barambai, Kalimantan Timur belum diketahui. Penelitian ini bertujuan menganalisis ukuran ikan, nisbah kelamin, hubungan panjang bobot, dan faktor kon-disi. Total 347 sampel ikan dikumpulkan dengan menggunakan berbagai alat tangkap di Sungai Barambai dari bulan Agustus sampai Oktober 2017. Hasil penelitian menunjukkan bahwa panjang total ikan berkisar dari 45,67 sampai 146,01 mm dan bobot tubuh berkisar 1,27- 43,34 gram. Nisbah kelamin jantan dan betina 1: 1,12. Model hubungan panjang bobot ikan jantan W = 1x10-5 L3,063, ikan betina W = 8x10-6L3,108,dan keseluruhan jenis ikan W =  9 x 10-6  L3,091. Faktor kondisi (K) ikanwader bintik dua berkisar antara 0,826 - 2,214 dan rata-rata 1,163. 

scholarly journals Analysis of some biological aspects of the Blue-spotted tilapia, Oreochromis leucostictus (Trewavas, 1933) in Lake Naivasha, Kenya

2020 ◽  
Author(s):  
Cishahayo Laurent ◽  
Edwine Yongo ◽  
Edna Waithaka ◽  
Eunice Mutethya
Keyword(s):  
Sex Ratio ◽  
Growth Condition ◽  
Condition Factor ◽  
Lake Naivasha ◽  
Weight Relationship ◽  
Total Length ◽  
Fish Samples ◽  
Commercially Important ◽  
Biological Aspects ◽  
The Mean

Oreochromis leucostictus is one of the commercially important tilapiine in Lake Naivasha. Its stock in the lake has declined due to the effect of fishing and pollution. This study investigated on its length-weight relationship, condition factor, sex ratio and maturity. Fish samples (233) were caught using gillnets of mesh-sizes 2-5 inches. Each individual fish was measured (cm) and weighed (g) in the field. The specimens were preserved in ice and transported to the laboratory for analysis of maturity. The mean (±SE) total length and weight for all fish was 21.3±0.3 cm TL and 187.4±8.3 g, respectively. Males 22.3±0.4 cm were significantly larger than females 19.2±0.5 cm. The mean condition factor was 1.06, 0.99 and 1.04 for male, female and combined sexes, respectively. The overall population sex ratio was 2.19:1.0 (male: female) that deviated significantly from 1:1. The slope b of the length-weight relationship was 1.92, 3.07, 2.33 for males, females, and combined sexes, respectively. Length at 50% maturity was estimated at 21.0 cm for females and 26.0 cm for males. Ripe oocytes and testis were found in all fish sizes. Comparisons with earlier studies suggest that the parameters of its growth, condition and maturity vary greatly from the different habitats.

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 Biological aspects of Longfin Mojarra (Pentaprion longimanus, Cantor 1849) in north coast of Central Java, Indonesia

2018 ◽  
Vol 19 (2) ◽  
pp. 683-689
Author(s):  
DIAN OKTAVIANI ◽  
RIA FAIZAH ◽  
DUTO NUGROHO
Keyword(s):  
Sex Ratio ◽  
Fish Species ◽  
Average Length ◽  
Gonadosomatic Index ◽  
Demersal Fish ◽  
The Body ◽  
North Coast ◽  
Weight Relationship ◽  
Central Java ◽  
Biological Aspects

Oktaviani D, Faizah R, Nugroho D. 2018. Biological aspects of Longfin Mojarra (Pentaprion longimanus, Cantor 1849) in north coast of Central Java, Indonesia. Biodiversitas 19: 683-689. Longfin Mojarra (Pentaprion longimanus) locally named as rengganis, is a demersal fish species that is commonly caught in Scottish seine fisheries off the north coast of Java. The fisheries are in heavily harvest level since decades. The aim of this study was to observe the biological aspects of this species. Observations were made between August 2014-July 2015 from Tegal fishing port, western part of north coast central Java. General life-history parameters were measured, i.e., monthly length frequency for 1876 fishes, among them 573 specimens were observed for length-weight relationship, including 541 specimens for sex ratio and maturity stages. Fulton index, Gonadosomatic index, sex ratio and estimated length at first mature were analyzed. The result showed fish size ranged between 7.4 to 15.3 cmFL with the average length of 11.2+1.75 cmFL. We found that length-weight relationship tends to be isometric which statistically the body growth coefficient (b) is equal to 3 (tc = 0.53 < tab; p<0.05) . Monthly Fulton indexes ranged between 1.05-2.87 with an average of 1.90 + 0.17. Sex ratio during observation was not significantly different (p<0.05) from the expected ratio of 1: 1. Mature females occurred year-round with the highest percentage observed from January to April 2015. The estimated length at first maturity was 13.04 cm FL. These biological parameters will be used to support the population study of the future demersal fish species to improve conservation and management measures.

ASPEK BIOLOGI PERIKANAN IKAN LAYANG (Decapterus Macrosoma) YANG TERTANGKAP DENGAN BAGAN RAMBO DI PERAIRAN PANTAI SUMPANG BINANGAE KABUPATEN BARRU

2021 ◽  
Vol 4 (1) ◽  
pp. 12-21
Author(s):  
Hasrun Abdullah ◽  
Kasmawati Saleh
Keyword(s):  
Sex Ratio ◽  
Fish Species ◽  
Economic Value ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Male And Female ◽  
Flying Fish ◽  
Biological Aspects ◽  
First Maturity ◽  
First Time

Flying fish is one of the dominant pelagic fish caught and has high economic value in Sumpang Binangae Waters. This fish is caught by many chart rambo fishing gear. The purpose of this study was to determine the biological aspects of flying fish especially those caught in the waters of Sumpang Binangae, Barru Regency. This research will be conducted for four months, from May 2020 to August 2020, which is located at the Sumpang binangae Fish Landing Base, Barru district. Identification of flying fish species is done visually by looking at the color and body shape and special characteristics based on the Guidelines for Practical Identification of Small Pelagic Fish Species in Figure, Suwarso, 2010, The composition of the type of catch is calculated based on the amount of catch (tonnes). Sex ratio, TKG, (Walpole 1993), Length of First-Time Gonads of Fish (Lm)The results showed that based on the composition of the types of fish caught, the percentage of the dominant catch was 27.41% mackerel (Rastrelliger kanagurta), 24.26% flying fish (Decapterus macrosoma), 23 anchovies (Stolephorus sp). 28%, squid (Loligo sp) by 2.24%, flying fish (Cypselurus sp) by 8.98% and tembang fish (Sardinella fimbriata) by 13%, while the type of flying fish caught was only one type, namely white-tailed flying fish. slightly yellowish (Decapterus macrosoma). Comparison of the number of male and female sex, it was found that the sex ratio of male and female Layang fish (D. macrosoma) was 52.83%: 47.17% or 1.12: 0.89, l. The size of the first maturity of male flying fish gonads in Barru waters is at the size of 15.68 cm or 156 mm and the female is at the size of 15.62 cm or 156 mm, while the male and female fish that are immature gonads are more than the fish that are mature gonads.  

scholarly journals Mudskipper, periophthalmodon schlosseri (pallas) from the Naf river

2013 ◽  
Vol 47 (4) ◽  
pp. 449-452 ◽  
Author(s):  
BK Saha
Keyword(s):  
Sex Ratio ◽  
Standard Length ◽  
Head Length ◽  
Caudal Peduncle ◽  
Snout Length ◽  
Weight Relationship ◽  
Total Length ◽  
Periophthalmodon Schlosseri ◽  
The Mean

A study on morphometrics, meristics sex ratio, ovary condition of Periophthalmodon schlosseri was conducted in 2001. The mean of total length (49.63 + 5.99 mm), standard length (40.84 + 5.30 mm), snout length (4.12 + 0.65 mm), head length (9.86 + 1.39 mm), height of body (6.89+1.24 mm) and the length of caudal peduncle (6.96 + 1.08 mm) were calculated. The length-weight relationship was determined as TW = 0.00004639+2.5882 TL. The fin formula was D1 . 8-9; D2 .1/10-13; P1 . 11-14; P2 . 11-14; A. 1/11. The sex ratio was found to be 1:0.63. The average of ovary length (6.2 +0.84 mm), ovary breadth (3.54 +0.95 mm) and diameter of ova (0.22 +0.04 mm) were also determined. Bangladesh J. Sci. Ind. Res. 47(4), 449-452, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14076

scholarly journals Biological aspects of spotted seerfish Scomberomorus guttatus (Bloch & Schneider, 1801) (Scombridae) from north-eastern Arabian Sea

2018 ◽  
Vol 65 ◽  
Author(s):  
C. Anulekshmi ◽  
J. D. Sarang ◽  
S. D. Kamble ◽  
K. V. Akhilesh ◽  
V. D. Deshmukh ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Arabian Sea ◽  
Biological Information ◽  
Relative Fecundity ◽  
Northern Arabian Sea ◽  
North Eastern ◽  
Eastern Arabian Sea ◽  
Biological Aspects ◽  
Gravid Females ◽  
First Maturity

Spotted seerfish <em>Scomberomorus guttatus</em> (Bloch &amp; Schneider, 1801) is one of the highly priced table fishes in India, which contributed 4.7% of all India scombrid fishery with 17,684 t landed in 2014. Its fishery is dominant in the Arabian Sea and northern Arabian Sea contributed 62% to India’s spotted seerfish fishery. Biological information on <em>S. guttatus</em> is scarce and the same was studied during the period 2010-2014 from Maharashtra coast, north-eastern Arabian Sea. A total of 930 specimens (185-550 mm FL) collected from commercial landings were used for the study. Length-weight relation of pooled sexes was estimated as log (W) = -3.1988+2.66074 log (L) (r2 = 0.93). Fishery was dominated by males with the sex ratio of 0.76:1. Relative fecundity ranged from 105-343 eggs g-1 of bodyweight. The length at first maturity (Lm) was estimated to be 410 mm TL for females. Mature and gravid females were dominant in May and August-November. Dietary studies (% IRI) showed dominance of <em>Acetes</em> spp.

scholarly journals Morphometric aspects of Scyllarides latus

2004 ◽  
Vol 5 (2) ◽  
pp. 65 ◽  
Author(s):  
T. ROMEO ◽  
G. FLORIO ◽  
F. LENTINI ◽  
L. CASTRIOTA ◽  
M. FALAUTANO ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Correlation Matrix ◽  
Carapace Length ◽  
Size Range ◽  
Body Measurements ◽  
Weight Relationship ◽  
Representative Species ◽  
Biological Aspects ◽  
Straits Of Messina ◽  
Wide Size Range

The slipper lobster, Scyllarides latus (Latreille, 1803), is the only representative species of the genusScyllarides in the Mediterranean Sea. In this study, we examined some biological aspects of this species sampled in the Straits of Messina. The specimens were sexed, measured and weighed. The relationships between body measurements (length and width of the carapace, antennal length) and length-weight relationship were calculated. Furthermore, the correlation matrix (Pearson’s coefficient) was calculated. Two hundred specimens were collected, ranging in size from 81 to 305 mm in total length, and between 21 and 1490 g in weight. A rare juvenile of 39 mm CL was recorded. A sex ratio of 1:1 was found. The carapace length – weight relationship was almost isometric. The wide size range sampled and the presence of a juvenile, indicate an interesting habitat for studying the presence and growth of Scyllarides latus in the Straits of Messina.

scholarly journals Native Species in Barito Upstream at South Kalimantan, Indonesia: Sex Ratio and Length-Weight Relationship of Seluang Batang Fish (Rasbora argyrotaenia Blkr 1850)

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Erwin Rosadi ◽  
Endang Yuli H. ◽  
Daduk Satyohadi ◽  
Gatut Bintoro
Keyword(s):  
Sex Ratio ◽  
Native Species ◽  
Scientific Data ◽  
Time Interval ◽  
Female Fish ◽  
Male And Female ◽  
Weight Relationship ◽  
Intensive Exploitation ◽  
Chi Square Analysis ◽  
Relationship Of

<p>Freshwater potential in South Kalimantan is one million hectares and 140 species of fish are exploited. One of the fish resources in the intensive exploitation in South Kalimantan is Seluang Batang fish (<em>Rasbora argyrotaenia</em>). The purpose of this study was to obtain scientific data related to the sex ratio of fish and length-weight relationships of <em>R. argyrotaenia</em> in Barito upstream at South Kalimantan. The study was conducted in the Barito upstream in South Kalimantan, on location 2<sup>o</sup>57'36.10'' S 114<sup>o</sup>5'37.92'' E; 3<sup>o</sup>01'07.86" S 114<sup>o</sup>45'29.28'' E. Taking of samples by the method of Ford-Walford plot lasts for one year with a fixed time interval decision which is one month. Data obtained by comparing the sex ratio between the number of male fish with the number of females and multiplied by 100%. To test the hypothesis difference in the number of male and female fish used chi-square analysis of the end. Analysis of length-weight relationship of fish with regression test and were calculated using a cubic pattern. The results showed that the ratio of fish <em>R. argyrotaenia</em> male and female is 3: 1 and the growth pattern of male and female fish are negative allometric.</p>

scholarly journals Some aspects of the reproductive biology and sex-ratio of Cirrhina reba (Hamilton) (Cyprinidae : Cypriniformes)

2012 ◽  
Vol 30 ◽  
pp. 21-24
Author(s):  
Sarmin Akther ◽  
Shirin Akther
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Standard Length ◽  
Total Weight ◽  
Chi Square ◽  
Male And Female ◽  
Total Length ◽  
Chi Square Test ◽  
Somatic Index

Some aspects of the reproductive biology viz. sex-ratio gonadal length index (G.L.I.), gonado somatic index (G.S.I.) and sex-ratio of Cirrhina reba were studied during September 2004 to July 2005. In present study the highest values of GLI (33.76) and GSI (0.63) were in the month of July. Total length (TL) and gonadal length (GL), total weight (TW) and gonadal weight ( GW ), standard length (SL) and gonadal length ( GL ) and gonadal weight relationships were found to be positive; and the relationships were: GL = -3.873 + 0.219 TL (r = 0.992), GW = 0.01511+0.000815 TL (r = 0.979), GL = -2.6030+0.253 SL (r = 0.990), GL = 0.01997+0.000938 SL (r= 0.976), GW = 13.2952+0.6064 TW (r = 0.958), GW = 0.0772+0.00233 TW (r = 0.979). The sex- ratio of C. reba were 1:1.62 for male and female respectively. The Chi-square test showed significant differences of sex-ratio among months and totals.DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10739Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 21-24

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