Reproductive biology of Palaemon pandaliformis (Stimpson, 1871) (Crustacea, Decapoda, Caridea) from two estuaries in southeastern Brazil.

Invertebrate Reproduction & Development 53 (4): 223-232. https://doi.org/10.1080/07924259.2009.9652308 .

Abstract:

The reproductive biology of Palaemon pandaliformis was investigated in the estuaries of the Comprido and Ubatumirim rivers at Ubatuba, State of São Paulo, Brazil, by means of samples obtained from April 2003 to March 2004. Samples were collected monthly, using sieves, which were passed several times under the marginal vegetation. In the laboratory, the sex of each shrimp was assessed and the carapace length (CL, mm) measured. Ovigerous females were separated and counted for determination of fecundity. The egg diameter was measured with a calibrated micrometer scale under an stereo-microscope. The breeding period was seasonal in the Comprido River Estuary, and continuous throughout the year in the Ubatumirim River estuary. The mean size of ovigerous females was higher in the population in the Comprido River (5.90±0.68 mm CL ±sd) than in the Ubatumirim River (5.50±0.58 mm). The most intense reproductive period of P. pandaliformis was from October 2003 to March 2004 for bo h estuaries. The mean fecundity of P. pandaliformis in the Comprido River was 189±53 eggs (n=124), and at Ubatumirim, 130±25; mean ±sd eggs (n=80), values that are similar to other palaemonid species from similar latitudes. A positive correlation between the number of eggs and the size of the female was obtained for both populations. The eggs were relatively small, indicative of low energy allocation to each embryo, with mean dimensions ranging from 0.44±0.08 mm to 0.69±0.069 mm.

campaneli-biblio

Infestation of two shrimp species of the genus Palaemon Fabricius, 1798 (Decapoda, Palaemonidae) by an isopod of the genus Probopyrus Giard & Bonnier, 1888 (Bopyridae) from the Brazilian southeast coast.

NAUPLIUS 26: e2018026. DOI 10.1590/1678-4766e201802 .

Abstract:

We determined the infestation rate of Probopyrus sp. in populations of Palaemon pandaliformis (Stimpson, 1871) and P. northropi (Rankin, 1898) in the Ubatumirim River, localized in a mangrove ecosystem on Ubatumirim Beach, northern coast of the state of São Paulo, Brazil. Samplings were carried out monthly from April 2003 to March 2004. Monthly prevalence varied from 0 to 4.94 % for P. pandaliformis, and from 0 to 4.54 % for P. northropi. This is the first record of Probopyrus sp. infesting the studied species in this region. Species of Probopyrus (Giard and Bonnier, 1888) seem to have a high plasticity with regard to palaemonid hosts, as they can be parasites of shrimps in both Palaemon (Fabricius, 1798) and Macrobrachium (Spence Bate, 1868). The linear relationships between the parasite and host sizes suggest that the parasite infests both hosts early in their development. We concluded that the infestation of Probopyrus sp. has little impact on Palaemon populations, mostly due to the low prevalence of infestation.

nunes-biblio

The larval development of a fresh-water prawn, Palaemon pandaliformis (STIMPSON, 1871), under laboratory conditions (Decapoda, Palaemonidae).

Crustaceana 71(1): 9-35

Abstract:

The larval development pf the palaemonid prawn Palaemon pandaliformis (Stimpson, 1871) was followed under laboratory conditions. Metamorphosis to postlarvae was first observed 19 days after hatching at a temperature of 27 ± 1 ºC in freshwater, after passing through several larval stages. It was also posisble to obtain postlarvae after eight, nine, an ten larval stages. The pattern of development ist discusse in relation to other Palaemon species with a similar number of larval stages. This is the only species in the genus with the third pereiopod appearing as a rudimentary bud in the first larval stage.

gamba-biblio

Influence of land crabs Gecarcinus quadratus (Gecarcinidae) on distributions of organic carbon and roots in a Costa Rican rain forest.

Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) 54(1): 149-161, March 2006.

Abstract:

In  Costa  Rica’s  Corcovado  National  Park,  the  fossorial  land  crab,  Gecarcinus  quadratus (Gecarcinidae), densely populates (1- 6 m²) a region of forest extending from the Park’s Pacific coastline inland to ca. 600 m. Throughout this coastal forest (‘crabzone’), crabs selectively forage for fallen leaves and relocate them to subterranean burrow chambers. Comparisons between surface soils (0 - 15 cm) sampled from the crab-zone and forest lying immediately inland that is naturally devoid of crabs (‘crabless zone’) suggest that crabzone top soils contained less organic carbon and fewer fine and very fine roots. In contrast, soils sampled from 70 - 100 cm depths in the crabzone contained twice the carbon of the crabless zone during the dry season but similar values during the wet season. Two years of experimental crab exclusion from 25 m2 replicates established in the crabzone resulted in 16% more organic carbon content in surface soils relative to baseline conditions (n.s.) and 22% more carbon than final control values (P < 0.05). Excavations of burrow chambers, with an average (± SD) depth of 48 ± 12 cm, indicated localized, subterranean pockets of elevated (+ 60 %) organic carbon and increased densities of fine and very fine roots relative to same-depth samples from the crabzone unassociated with burrows chambers.

sherman-biblio

The description of a new species of the Neotropical land crab genus Gecarcinus Leach, 1814 (Crustacea, Decapoda, Brachyura, Gecarcinidae).

Zookeys. 2014; (435): 93–109. Published online 2014 Aug 18. doi: 10.3897/zookeys.435.7271

Abstract:

In this contribution a new species of the land crab genus Gecarcinus Leach, 1814, from the Neotropical Pacific coast of South America is described and illustrated. In addition to its unique body color, Gecarcinus nobilii sp. n. is distinguished from congeners by a distinctly wider carapace front and differences in the shape of the infraorbital margin. The new species is not isolated from Gecarcinus populations from the Pacific coast of Central America by an insurmountable geographic barrier. Considering the closure of the Panamanian Isthmus as a calibration point for morphological divergence between the trans-isthmian mainland populations of Gecarcinus, the virtual lack of morphological differentiation (other than color) between them and the distinctness of G. nobilii sp. n. suggests that G. nobilii sp. n. evolved from a common ancestor before the Isthmus closed.

perger-biblio

Northernmost record of the shamefaced crab Calappa granulata (Linnaeus, 1767) (Brachyura, Calappidae) in the Mediterranean area.

Crustaceana 85 (4/5):601-606. DOI: 10.2307/23212683.

Introduction:

The box crabs or shamefaced crabs (family Calappidae) are a distinctive group of marine crabs found in tropical and subtropical regions of the world. The family is best known for the shallow water genus Calappa with its unusual, shovel-shaped chelae. The shamefaced crab Calappa granulata is a sublittoral species known from the Mediterranean Sea and adjacent Atlantic Ocean from Portugal to Mauritania, including the Azores, Madeira, the Canary Islands, and the Cape Verde Islands. Spanò et al. (2004) reported that shamefaced crabs are distributed in all oceans, but particularly abundant in tropical waters and inhabiting a wide variety of bottoms (sandy, shell grit, hard rocks, and coral). In the Mediterranean, C. granulata occurs between 10 and 400 m (though not very common), while some authors noted it lives on sandy mud and muddy detritus at depths between 13 and 400-700 m. Typically, it burrows in inshore soft bottoms. The species can reach 10 cm CL (carapace length) and 9.2 cm CW (carapace width). In recent years, it has been found in the Mediterranean Sea at several locations: in the Gulf of Taranto (Ionian Sea) , in the Strait of Sicily , in the coastal waters of the Sea of Marmara, and in Edremit Bay (Aegean Sea). In the Adriatic Sea, it is very rare and has only been found in areas of the Southern and Middle Adriatic. The last records of this species were from the Southern Adriatic, during trawling operations in the framework of the E.U. Project MEDITS.

dulcic-biblio

The living marine resources of the Western Central Atlantic.

Volume 2: Bony fishes part 1 (Acipenseridae to Grammatidae).

FAO Species Identification Guide for Fishery Purposes and American Society of Ichthyologists and Herpetologists Special Publication No. 5.Rome, FAO. 2002. pp. 601-1374.

Summary:

This 3 volume field guide covers the species of interest to fisheries of the major marine resource groups exploited in the Western Central Atlantic. The area of coverage includes FAO Fishing Area 31. The marine resource groups included are the bivalves, gastropods, cephalopods, stomatopods, shrimps, lobsters, crabs, hagfishes, sharks, batoid fishes, chimaeras, bony  fishes, sea  turtles,  nd marine mammals. The introductory chapter outlines the environmental, ecological, and  biogeographical factors influencing the marine biota, and the basic components of the fisheries in the Western Central Atlantic. Within the field guide, the sections on the resource groups are arranged phylogenetically according to higher taxonomic levels such as class, order, and family. Each resource group is introduced by general remarks on the group, an illustrated section on technical terms and measurements, and a key or guide to orders or families. Each family generally has an account  summarizing family diagnostic characters, biological and fisheries information, notes on similar families occurring in the area, a key to species, a checklist of species and a short list of relevant literature. Families that are less important to fisheries include an abbreviated family account and no detailed species information. Species in the important families are treated in detail (arranged alphabetically by genus and species) and include the species name, frequent synonyms and names of similar species, an illustration, FAO common name(s), diagnostic characters, biology and fisheries information, notes on geographical distribution, and a distribution map. For less important spe-cies, abbreviated accounts are used. Generally, this includes the species name, FAOc ommon name(s), an illustration, a distribution map, and notes on biology, fisheries, anddistribution. The final volume concludes with an index of scientific and common names.

carpenter-biblio

Genetic Identification of the Northeastern Atlantic Spiny Spider Crab as Maja brachydactyla.

Journal of Crustacean Biology, Volume 28, Issue 1, 1 January 2008, Pages 76–81, https://doi.org/10.1651/07-2875R.1

Abstract:

The northeastern Atlantic spiny spider crab occurs from the British Islands to Senegal, where it is an important fishery resource. From morphological characters this crab has recently been proposed as a distinct species, Maja brachydactyla, although for commercial purposes it is still considered the same species as its Mediterranean congener M. squinado. We have studied variation at two mitochondrial genes in several crab populations from the Atlantic (putatively M. brachydactyla) and Mediterranean (M. squinado and M. crispata) basins, in order to clarify the taxonomic status of this crab in the northeastern Atlantic and Mediterranean regions. Phylogenetic analysis revealed that each of these three taxa forms a distinct and well-defined clade. While the divergence within each taxon was 0% for 16S and 0-0.3% for COI, divergence between taxa was 0.6-2.5% for 16S and 5.3-8.7% for COI; values that are in the range of the differences observed between other crustacean species. These results confirm the genetic distinctiveness of each taxa and support their designation as different species. Therefore, the Atlantic spider crab should be referred as M. brachydactyla, a fact that should be taken into account for conservation and commercial purposes.

Volltext (PDF)

The giant deep-sea scavenger genus Bathynomus (Crustacea, Isopoda, Cirolanidae) in the Indo-West Pacific.

Mémoires du Muséum national d’Histoire naturelle 193: 163-192.

Abstract:

Based on new material from the western Pacific and Indian Oceans, the deep-sea scavenging genus Bathynomus is revised. Six species are
redescribed: Bathynomus affinis Richardson, 1910 (range extended to the Arafura and Timor Seas), B. decemspinosus Shih, 1972, B.
doederleini Ortman, 1894 (range extended to San Bernardino Strait, Philippine Islands), B. immanis Bruce, 1986 (range extended to
Astrolabe Bay, Bismarck Sea), B. kapala Griffin, 1975 (range extended to off the Great Barrier Reef, Coral Sea) and B. pelor Bruce, 1986. Bathynomus propinquus Richardson, 1910 is considered to be a nomen dubium. Six new species are described: B. brucei n. sp. from off the Great Barrier Reef, Coral Sea; B. bruscai n. sp. from off the Great Barrier Reef, Coral Sea and Astrolabe Bay, Bismarck Sea; B. crosnieri n. sp. from off Madagascar, western Indian Ocean; B. keablei n. sp. from off the Malabar Coast, Arabian Sea; B. kensleyi n. sp. from the South China Sea, the Sulu Sea and the Coral Sea; B. richeri n. sp. from off NewCaledonia, plus Bathynomus sp. from the Gulf of Aden. Bathynomus giganteus A. Milne Edwards, 1879 is reported for the first time from the east coast of the United States. Two distinct groups occur in Bathynomus, a lineage of giant species which mature at about 150 mm length and a lineage of supergiant species which can grow to 500 mm in length. The greatest diversity of Bathynomus occurs between latitudes 20°N and 20°S on the Indian-Australian plate. Outlying species occur on plates in the western North Pacific and the western Atlantic.

Volltext PDF

Distinction between Two Hinge-beaked Shrimps Rhynchocinetes durbanensis Gordon and R. uritai Kubo (Family Rhynchocinetidae).

Revue Française d'Aquariologie et Herpétologie 19: 85–90.

Abstract:

Rhynchocinetes durbanensis Gordon reliably known only from South Africa is reported on the basis of specimens from the Philippines. This species has been sometimes recorded under the incorrect identification as R. uritai Kubo, to which the general color pattern is strongly similar, but some morphological characters and detailed color pattern are different from those of R. uritai from Japanese waters.