Callichirus major. Carolinian ghost shrimp. Callichirus major. ADW Pocket Guides on the iOS App Store! The Animal Diversity Web team is excited to announce. Biologia populacional de Callichirus major (Say, ) (Crustacea: Callianassidae) na Praia de Piedade, Brasil. Flavio de Almeida Alves-JúniorI, Marina de Sá. Category:Callichirus major Pleocyemata • Infraordo: Axiidea • Familia: Callianassidae • Genus: Callichirus • Species: Callichirus major.
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The embryonic development of C. A Student t test was applied to compare the value of abiotic factors between the dry and rainy seasons.
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We can conclude that the females are more abundant in the population, which is a pattern for callianassids of the Brazilian coast. However, they observed monthly oscillations in the sex ratio; the females were more abundant from September to February and the males, from March to September, and in this study, the females were more abundant in March, with ovigerous females in March and November, and males more abundant in August, Jajor, February and May.
In the case of species with planktonic larvae, it implies the transformation acllichirus its habit to a benthic form and survival until the time of settlement Done, According to the correlation matrix, the main abiotic factor influencing the abundance of C. The Student t test was applied to compare the abiotic factors between the dry and rainy periods.
The burrow temperature varied from They were classified as juvenile males, juvenile females, adult males, non-ovigerous females and ovigerous females.
The distribution by size class was obtained using 5 mm size classesto determine the mode of each sex. However, considering only the ovigerous females, the correlation with the burrow temperature was considered strong and significant.
The mean TL was Journal of Experimental Marine Biology and Ecology Autoecologia de Callichirus major Say,p. According to Wennerthe deviations in the sex ratio can be a result of the differences in the life cycle, migration, mortality and growth. Both phenomena also explain the higher proportion of females in the population. At the laboratory, the individuals were identified and sexed according to Melo A small peak was observed in August, transition from the rainy to the dry period.
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Marine Ecology9 1: In this study, recruitment was intensified between the summer and autumn, as a result of reproductive activity in the summer. Journal of Callivhirus Marine Biology and Ecology3: The burrow and air temperatures were higher in the dry period, and the rainfall was higher in the rainy period.
Archives of Fishery and Marine ResearchNehren, 46 2: The monthly proportion of juveniles and adults was estimated and a Chi-square test was applied to determine if they differed significantly from the expected proportion 1: In this sector, the smallest mean modal size was detected too.
Sampling was taken monthly from December to November Annual Review of Ecology and Systematics According to Botter-Carvalhothe reproductive period of C.
Thus, studies on reproduction, recruitment and sex ratio of these animals are still scarce. The determination of the reproductive period was based on the monthly percentages of ovigerous females Vazzoler, Archives of Fisheries and Marine Research46 2: Seasonal changes in the density of C.
Macrocrustaceans are important components of coastal ecosystem communities, with an important role in artisanal, commercial and recreational fisheries.
The burrow and air temperatures, as well as the sea water salinity, were measured in situ. The following abiotic factors varied significantly between dry and rainy periods: As maiores densidades de C.
During the field sampling, a large number of fishermen was observed at the area, and they selected the larger ghost shrimps to use as live bait.
Thalassinidea on a southern Brazilian sandy beach.
Category:Callichirus major – Wikimedia Commons
Although not significant, it was considered regularly correlated. Axiidea, ecology of sand beaches, ghost shrimp, reproductive period. From these ghost shrimps, were sampled in the dry period, and in the rainy one.