Rock crabs, Cancer irroratus, were collected from lobster traps, trawls, and by divers in the Bay ofFundy and southwestern Nova Scotia, 1980-81. Estimates of maturity were similar using gonad examination, measurements of chela height, and abdominal width/carapace width ratios. The carapace width (CW) at which 50% of male and female rock crabs were mature was estimated to be 62 and 49 mm, wherea...

The present study aimed to establish spatiotemporal food and feeding habits of the crab Pachygrapsus marmoratus inhabiting rocky shores southern Mediterranean Sea coast, exemplified by Al-Haniyah, Al-Hamamah, Susah sites in eastern Libya, relate them morphometric traits, abundance organisms habitat. A total 425 crabs collected during 2019 were used study. minimum maxim carapace length (CL), wei...

The carapace length-weight relationship in juvenile Brachyura (crabs) was studied theoretically to assess the relevance of the allometric factor and the validity of the condition factor as these factors are often not determined because most fishery investigations are conducted for adult population. The allometric factor appears to be the main parameter in the equation: W = aLb (where W = weight...

macrocyclops albidus and cyclops vicinus are the two important copepods living in hazar lake.for this study, 50 females for each species were collected. samples were taken between december 1999 andmarch 2000. length (pl), width (pw), and height (ph) of prosome and length (ul) and width (uw) ofurosome were measured in each female and subsequently, the following ratios pl/pw, pl/ph, pw/ph,pl/ul a...

The aim of the current study was to analyse the relationship between morphology of gilt’s ovary and the quantity and quality of recovered oocytes suitable for in vitro procedures. Forty ovaries of healthy 7–8 months old gilts from a local slaughterhouse divided into corpora lutea bearing (CL) and noncorpora lutea bearing (non-CL) ovaries were evaluated. Morphometric analysis (weight, length and...

Ontogenetic studies of vertebrate feeding performance can help address questions relevant to foraging ecology. Feeding morphology and performance can either limit access to food resources or open up new trophic niches in both aquatic and terrestrial systems. Loggerhead sea turtles are long-lived vertebrates with complex life histories that are marked by an ontogenetic shift from an oceanic habi...

Portunus pelagicus was collected at regular intervals from two marine embayments and two estuaries on the lower west coast of Australia and from a large embayment located approximately 800 km farther north. The samples were used to obtain data on the reproductive biology of this species in three very different envi­ ronments. Unlike females, the males show a loosening of the attachment of the a...