Fecundity of Hilsa ilisha (Hamilton, 1822) from the Bay of Bengal

Saifullah, Asm; Rahman, Md. Sayedur; Khan, Yusuf Sharif Ahmed

doi:10.3923/pjbs.2004.1394.1398

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…Measuring three thousand of eggs, we observed that size of egg varied between 0.413 and 810.21 μm in diameter and mean value of size is 582.54 μm. The outcome of this study agrees with some other studies [ 43 , 44 ]. Haldar et al [ 44 ] estimated egg size of Hilsa in Bangladesh as 0.7–0.9 μm.…”

Section: Discussionsupporting

confidence: 94%

“…Mookerjee and Mazumdar [ 47 ] concluded that reproductive capacity of a fish varies with space availability and food supply. This type of variation was also documented by several studies [ 43 , 48 , 49 ]. Mondal et al [ 48 ] reports fecundity of Hilsa from Patuakhali of Bangladesh as 0.169 million to 1.09 million.…”

Section: Discussionsupporting

confidence: 81%

“…Haldar et al [ 44 ] estimated egg size of Hilsa in Bangladesh as 0.7–0.9 μm. Saifullah et al [ 43 ] reports eggs size of Hilsa as 0.66–0.88 μm, whereas Islam et al [ 45 ] found the egg size varied from 0.3 to 0.6 μm. Mathur [ 46 ] examined egg size of Hilsa from Hugly river in West Bengal of India as 0.76–0.86 μm.…”

Section: Discussionmentioning

confidence: 99%

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Estimating peak breeding season, size at first maturity and variation in fecundity and egg-size at different sizes of Hilsa (Tenualosa ilisha)

Abu Rayhan,

Rahman,

Bose

et al. 2023

Heliyon

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 81%

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Estimating peak breeding season, size at first maturity and variation in fecundity and egg-size at different sizes of Hilsa (Tenualosa ilisha)

Abu Rayhan,

Rahman,

Bose

et al. 2023

Heliyon

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“…Albeit hilsa spawn all the year round, the full moon phase in Bengali month Ashwin-Kartik (September-October) Saifullah et al, 2004) coincides with the peak spawning season. The spawning cycle is closely synchronized with the lunar cycle, and intense spawning is observed during three-days before and after the new moon and the full moon (Miah et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Fishing Enclosure as a Simple Approach to Stimulate Spawning Success of Tenualosa ilisha (Hamilton, 1822) in Bangladesh

Alam

Flura

Moniruzzaman

et al. 2023

Am. J. Life Sci. Innov.

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The study was intended to assess the impact of fishing enclosure during the peak breeding time of hilsa, Tenualosa ilisha on its breeding success. During the last peak breeding season of hilsa (October 4-25, 2021) a comprehensive investigation was attempt to evaluate the impact of fishing enclosure by “MV Rupali Ilish” research vessel, speedboat and experimental fishing net were deployed to demeanor a rigorous investigation in and around the spawning grounds areas (about 7,000 sq km, including Moulvirchar, Monpura, Dhalchar and Kalirchar). Additionally, data were also assumed from landing stations (via terrestrial cruises) near the spawning ground areas and other hilsa prone region of Bangladesh. The percentage of spent hilsa (locally called pite) and oozing hilsa were monitored following a standard protocol. Among all the hilsa captured in and around the spawning grounds, the proportion of male and female were 16-41% and 85-97%, respectively of the total catch, suggesting a male and female sex ratio (1:2.3). The rate of breeding success in 2021 was 51.76% i.e., 51.7% hilsa successfully participated in the breeding process which was 103.52% higher than the base year (2001-02). The approximate number of fertilized eggs in 2021 was 7,86,314 kg. Increased production of hilsa eggs and jatka indicated a positive impact of twenty-two days fishing enclosure. Percentages of gravid and oozing hilsa were also found higher compared to previous years. Due to the prohibition of all types of fishing, the percentage of female hilsa in the breeding areas increased up to 83.96%. Overall, twenty-two days fishing enclosure was found very effective for successful spawning of hilsa.

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“…Fecundity of fishes varies from species to species, also within same species due to different factors such as size, age, gonad weight, ecological condition of the water body etc. (Saifullah et al 2004).…”

Section: Introductionmentioning

confidence: 99%

FECUNDITY, GONADO-SOMATIC INDEX (GSI), CONDITIONING FACTORS, FOOD AND FEEDING HABIT AND LENGTH- WEIGHT RELATIONSHIP OF GOLD SPOT MULLET, Liza parsia

et al. 2022

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In order to estimate the fecundity, reproductive character and feeding habit of Liza parsia, 75 gravid females were collected from Pasur River and different shrimp farms of Khulna district. The equation for the total length-body weight and standard length-body weight relationship of the species were found to be BW = 9.769 x TL - 101.4 (R² = 0.883) and BW = 9.921 x SL - 77.19 (R² = 0.865) respectively. The condition factor ranged from 10.12-15.05 having mean value of 12.35+1.08. Fecundity of Liza parsia ranged from 56541 to 188860 and the mean fecundity was calculated as 122999±30035. Total weight of the gonad varied from 5.41 to 18.41 g where the left lobe of the ovary varied from 2.78 to 9.57 g and the right lobe varied from 2.63 to 9.25 g. The mean weight of the right lobe of the gonad was 5.942±1.409 g where the mean weight of the left lobe was 5.589±1.381 g and the mean weight of gonad was 11.532±2.773 g. The regression equation for fecundity with total length, standard length, body weight and gonad weight was estimated as F= -176359+16034.5 x TL (R2=0.60), F= -132956+16059.9 x SL (R2=0.57), F= -5595.3+1588.79 x TL (R2=0.63), F= 9048.16+9881.27 x GW (R2=0.83) respectively. The regression equation for total length, standard length and body weight with the gonad weight was estimated as GW= -19.154+1.64 x TL (R2=0.74) and GW= -1.78+0.16 x BW (R2=0.80) respectively. The GSI values obtained in the present study varied between 7.90 to 17.61 with mean value of 14.20+1.65. The stomach contents were algae, diatoms, desmids, plant materials, annelids, crustacean, bivalves, fishes, detritus and sand grains. Food items indicated that they are omnivorous in its feeding habits.

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Fecundity of Hilsa ilisha (Hamilton, 1822) from the Bay of Bengal

Cited by 7 publications

References 6 publications

Estimating peak breeding season, size at first maturity and variation in fecundity and egg-size at different sizes of Hilsa (Tenualosa ilisha)

Estimating peak breeding season, size at first maturity and variation in fecundity and egg-size at different sizes of Hilsa (Tenualosa ilisha)

Fishing Enclosure as a Simple Approach to Stimulate Spawning Success of Tenualosa ilisha (Hamilton, 1822) in Bangladesh

FECUNDITY, GONADO-SOMATIC INDEX (GSI), CONDITIONING FACTORS, FOOD AND FEEDING HABIT AND LENGTH- WEIGHT RELATIONSHIP OF GOLD SPOT MULLET, Liza parsia

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