North Atlantic right whales (NARW) are critically endangered and have been declining in abundance since 2011. In the past decade, human-caused mortalities from vessel strikes entanglements increasing, while birth rates population at a 40 yr low. addition to abundance, recent studies shown that NARW length-at-age is decreasing due energetic impacts of sub-lethal entanglements, body condition poo...

Fecundity, length at first spawning, and spawning seasonality of Stolephorus purpureus were dete~minedby examining preserved ovarian eggs and fish captured throughout a 4-year period. Fecundity was estimated from the numbel of eggs in the most advanced ovarian mode after it was determined that all these eggs hydrated and were spawned. Fecundity (Y) was related to fish weight (X) by the hyperbol...

Stock assessment and reproductive biology of the blue swimming crab, Portunus pelagicus, in Bandar Abbas coastal waters was conducted from August 2006 to July 2007. A total of 424 male and 348 female crabs were taken to the laboratory for length, weight and reproductive biometry. Estimate of growth parameter of crab showed t asymptotic carapace width (CW) was 172.5 mm, the curvature parameter, ...

The reproductive biology of albacore tuna, Thunnus alalunga, in the western Indian Ocean was examined through analysis of the sex ratio, spawning season, length-at-maturity (L50), spawning frequency and fecundity. From 2013 to 2015, a total of 923 female and 867 male albacore were sampled. A bias in sex ratio was found in favor of females with fork length (LF) < 100 cm. Using histological analy...

The relationship between body size and fecundity of adult female Glyptotendipes paripes collected along southern shore areas of Lake Monroe, Sanford, FL, was studied by measuring wing length and examining ovaries, follicular development, and number of eggs/egg mass. Wing length of nulliparous, as well as parous females, had a significant (P < 0.01) linear relationship with dry body weight. Larg...

The quantitative characters in Drosophila such as body size or fecundity, are very sensitive to environmental changes e.g. temperature or larval nutrition under laboratory conditions. In nature, the same situation is found where changes in annual temperature or humidity affect the type of flora as well as the size of Drosophila, fauna. In the present studies, we found that latitudinal clines ex...

A study to investigate the reproductive biology of Aspidoparia jaya was conducted in Bangladesh where a total 80 fish samples were collected on monthly basis from Atrai River and Jamuna during period January 2022 December 2022. The highest values gonado-somatic index (GSI) recorded July (11.37±1.75%) (9.55±1.35%), whereas individual fecundity 6990±1280 5755±1050 ova diameter 0.55±0.05 0.52±0.03...

The present study was conducted to investigate the reproductive biology of Neotropius atherinoides in Bangladesh Fisheries Research Institute, Floodplain Sub-station, Santahar, Bogura, Bangladesh. A total number 70 fish samples were collected on monthly basis from Atrai River and Jamuna during period September 2021 August 2022. highest mean value gonado-somatic index (GSI) recorded July (12.55±...

The red tree coral Primnoa pacifica is an important habitat forming octocoral in North Pacific waters. Given the prominence of this species in shelf and upper slope areas of the Gulf of Alaska where fishing disturbance can be high, it may be able to sustain healthy populations through adaptive reproductive processes. This study was designed to test this hypothesis, examining reproductive mode, ...