New Insights into the Male Morphotypes of the Amphidromous Shrimp (Weigmann, 1836) (Caridea: Palaemonidae) and a Discussion on Social Dominance Hierarchies.

Male morphotypes in a population may lead to the development of social dominance hierarchies in crustacean species. Currently, is the decapod crustacean genus with the largest record of species that present the development of hierarchies. has morphological characteristics that indicate the presence of male social dominance within its populations.

Genetic variation and cryptic lineage among the sergestid shrimp (Decapoda).

The taxonomic status of the sergestid shrimp, has been questioned for several decades. No specific study has been performed thus far to resolve the incongruences. This species has a wide geographical range in the western Atlantic and is represented by two formally accepted subspecies: , distributed in North America, and , present in South America.

New Insights into the Life-history Traits of the Night Shrimp (Caridea: Processidae) in the Western Atlantic.

We analyzed sexual dimorphism, sex ratio, relative growth, morphological sexual maturity, fecundity, embryo volume, and reproductive output of a population of the night shrimp from the Southeast coast of Brazil. Sampling was seasonally conducted, from June 2016 to April 2019 in Ubatuba, São Paulo. Our results showed the presence of sexual dimorphism in the body size, with females being larger than males.

Morphology of the early larval stages of Lysmata lipkei Okuno amp; Fiedler, 2010 (Caridea: Lysmatidae): an invasive shrimp in the Western Atlantic.

Considering the importance of establishing different approaches to the early detection of invasive species, the present study aimed to describe and illustrate the morphology of the early larval stages of the shrimp Lysmata lipkei, an invasive species in the Western Atlantic. Additionally, we did a morphological comparison and a review of the other Lysmata species from the Western Atlantic Ocean with a known larvae description. The larvae used in this study were obtained by the maintenance, under laboratory conditions, of ovigerous hermaphrodites of L.

Modulating factors of the abundance and distribution of (Latreille, 1819) (Decapoda, Portunoidea), a fishery resource, in Southeastern Brazil.

This is the first study to examine how different environmental factors may influence the distribution of swimming crab across geographically distant and distinct habitats. We analyzed the influence of bottom water temperature and salinity, sediment texture and organic matter content on the spatiotemporal distribution of . The crabs were collected from January 1998 until December 1999 by trawling with a shrimp fishing boat outfitted with double-rig nets.