Alien crustacean species recorded in Ecuador

The kinetic characteristic (Km) of cholinesterase from the crab Chasmagnathus granulata, the shrimp Farfantepenaeus paulensis and the fish Odontesthes bonaeriensis were compared and correlated with the anticholinesterasic effect of eserine (physostigmine). For the crustaceans, the estimated Km values were about 5-8 times higher than that estimated for the fish (0.04 mM). In the crab and the shrimp, the concentration of eserine which inhibited 50% of cholinesterase activity (IC50) was estimated as 5.33x10-4 and 4.33x10-4 mM, respectively. In both cases, it was significantly higher (P < 0.05) than that estimated for the fish larvae (7.43x10-5 mM). A high Km could reflect a lower affinity of the cholinesterase for its natural substrate, acetylcholine, or for substrate analogues such as carbamates and organophosphorous pesticides. If we consider the IC50 for eserine as an index of enzyme susceptibility to pesticide inhibition, the cholinesterase from the fish larvae may be a better useful tool in assays for pesticide biomonitoring than that from crustacean species.

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Demographic responses of Heterocypris incongruens (Ostracoda) related to stress factors of competition, predation and food

Journal of Limnology ◽

10.4081/jlimnol.2016.1367 ◽

2016 ◽

Vol 75 (s1) ◽

Cited By ~ 2

Author(s):

Rocio Fernandez ◽

Sarma Nandini ◽

S.S.S. Nandini ◽

Maria E. Castellanos-Páez

Keyword(s):

Life Expectancy ◽

Population Growth ◽

Reproductive Output ◽

Cichlid Fish ◽

Poor Quality ◽

Stress Factors ◽

Temporary Ponds ◽

Crustacean Species ◽

Heterocypris Incongruens ◽

Demographic Responses

Heterocypris incongruens is a widely distributed ostracod which can maintain its populations under stressful conditions such as those in temporary ponds and under low-quality diets, for example, detritus. It often co-occurs with cladocerans and fish living in shallow water bodies. Nevertheless, little is known about its response to the presence of predators, its consumption capacity of cyanobacteria typically present in eutrophic systems, and its interaction with other species in similar habits. We studied here the demographic responses of H. incongruens fed the green alga Scenedesmus acutus, two strains of Microcystis cf. aeruginosa and Limnothrix sp. Experiments were conducted separately and together in the presence of the cladoceran Simocephalus vetulus and the cichlid ﬁsh, Oreochromis kairomones. The ostracod maintained growth in all treatments, the reproductive output decreased on dietary Limnothrix sp., and its life expectancy was significantly lower with the toxic strain of Microcystis. The coexistence of both crustacean species increased the rate of population growth (~ 0.33 day-1) of S. vetulus and life expectancy (36-44 days) of H. incongruens on the test diets compared with controls (23-33 days). Our study suggests facilitation affects the interaction between the two microcrustaceans, especially on poor quality cyanobacterial diets.

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First reports of short-term temporal variations in crustacean species richness in north Patagonian coastal temporary pools

Nauplius ◽

10.1590/2358-2936e2021020 ◽

2021 ◽

Vol 29 ◽

Author(s):

Patricio De los Ríos-Escalante ◽

Francisco Encina-Montoya ◽

Eriko Carreño ◽

Francisco Correa-Araneda ◽

Carlos Esse

Keyword(s):

Species Richness ◽

Temporal Variations ◽

Temporary Pools ◽

Short Term ◽

Crustacean Species

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Negative effects of the invasive brown trout Salmo trutta on freshwater crustacean species: predation on the endangered Japanese endemic crayfish species Cambaroides japonicus by the trout

NIPPON SUISAN GAKKAISHI ◽

10.2331/suisan.72.447 ◽

2006 ◽

Vol 72 (3) ◽

pp. 447-449 ◽

Cited By ~ 2

Author(s):

KAZUYOSHI NAKATA ◽

TOSHIYASU NAKAOKA ◽

SEIJI GOSHIMA

Keyword(s):

Brown Trout ◽

Salmo Trutta ◽

Negative Effects ◽

Crustacean Species ◽

Freshwater Crustacean ◽

Crayfish Species

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GENETIC CONSIDERATIONS IN SELECTING CRUSTACEAN SPECIES FOR AQUACULTURE1

Proceedings of the annual meeting - World Mariculture Society ◽

10.1111/j.1749-7345.1977.tb00143.x ◽

2009 ◽

Vol 8 (1-4) ◽

pp. 543-555 ◽

Cited By ~ 1

Author(s):

Keith Nelson

Keyword(s):

Crustacean Species

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Telomere length analysis in crustacean species: Metapenaeus macleayi, Sagmariasus verreauxi, and Jasus edwardsii

ICES Journal of Marine Science ◽

10.1093/icesjms/fsr144 ◽

2011 ◽

Vol 68 (10) ◽

pp. 2053-2058 ◽

Cited By ~ 7

Author(s):

Rosamond M. Godwin ◽

Stewart Frusher ◽

Steven S. Montgomery ◽

Jennifer Ovenden

Keyword(s):

Telomere Length ◽

Life Histories ◽

Age Determination ◽

Age And Growth ◽

Telomeric Dna ◽

Test Species ◽

Crustacean Species ◽

Jasus Edwardsii ◽

Length Analysis ◽

Sagmariasus Verreauxi

Abstract Godwin, R. M., Frusher, S., Montgomery, S. S., and Ovenden, J. 2011. Telomere length analysis in crustacean species: Metapenaeus macleayi, Sagmariasus verreauxi, and Jasus edwardsii. – ICES Journal of Marine Science, 68: 2053–2058. Estimates of age and growth in crustaceans have been historically problematic and presented significant challenges to researchers. Current techniques of age determination provide valuable data, but also suffer from disadvantages. Telomeric DNA has been proposed as an age biomarker because it shortens with age in some species. In this study, the feasibility of using telomere length (TL) to estimate age was examined in the school prawn Metapenaeus macleayi and the spiny lobsters Sagmariasus verreauxi and Jasus edwardsii. Carapace length (CL) was used as a surrogate for age, and terminal restriction fragment assays were used to test the relationship between TL and size. Degradation of telomeric DNA with time during storage significantly influenced TL estimates, particularly for M. macleayi. TLs obtained from species in this study were 10–20 kb. No relationship between CL and TL was detected for any of the test species, and TL did not differ between male and female M. macleayi. TLs of J. edwardsii pueruli were unexpectedly shorter than those of J. edwardsii adults. The suitability of TL as an age biomarker in crustaceans may be limited, but further research is needed to elucidate telomere dynamics in these species with their different life histories and lifespans.

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An updated checklist of groundwater crustaceans of India

Crustaceana ◽

10.1163/15685403-00003786 ◽

2018 ◽

Vol 91 (6) ◽

pp. 677-731

Author(s):

Yenumula Ranga Reddy

Keyword(s):

New Species ◽

Sampling Method ◽

Original Description ◽

Type Locality ◽

Peninsular India ◽

Crustacean Species

Abstract Only eight groundwater crustacean species were known in India till the end of 20th century. Analysis of about 4000 samples collected during 2000-2016 from diverse groundwater habitats, especially in certain pockets of the deltaic belt of the Rivers Krishna and Godavari in the southeastern peninsular India, has so far yielded about 90 new crustacean taxa. Of these, 67 new species have been described formally, which include, respectively, 34, 27, 3, 2 and 1 species each of Copepoda, Bathynellacea, Amphipoda, Isopoda and Ostracoda. The updated checklist presented herein includes a total of 87 species in 45 genera, 22 families and 8 orders. For each species, the reference to its original description, type locality, distribution, and ecological notes, co-occurring fauna, if any, and sampling method(s) are given. Besides map-pointing the type localities of the species, brief notes are given on the biogeography and conservation.

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Effects of Microalgae Chlorella vulgaris Density on the Larval Performances of Fresh Water Prawn Macrobrachium rosenbergii (De Man, 1879)

Indian Journal of Animal Research ◽

10.18805/ijar.b-1335 ◽

2021 ◽

Author(s):

R.T. Mathew ◽

Y.A. Alkhamis ◽

S.M. Rahman ◽

A.S. Alsaqufi

Keyword(s):

Fresh Water ◽

Chlorella Vulgaris ◽

Macrobrachium Rosenbergii ◽

Dry Weight ◽

Larval Survival ◽

Crustacean Species ◽

Treatment Groups ◽

Potential Applications ◽

Larval Production ◽

De Man

Background: Microalgae have several potential applications in early stages especially in the hatchery phase of several fish, mollusc and crustacean species. The present study aimed to evaluate the effects of microalgae Chlorella vulgaris at different concentrations on larval performances of Macrobrachium rosenbergii. Methods: Freshly hatched larvae were reared until the metamorphosis of first post larval (PL) stage in plastic aquaria (5 liter, 12ppt and 12L:12D) with a density of 10 larvae/liter under five randomly arranged treatment groups in 3 replicates such as, 0×105 (T1, control) and four different concentrations of C. vulgaris 5×105 (T2), 10×105 (T3), 15×105 (T4) and 20×105 (T5) cells/ml. Larvae were fed Artemia (6 nauplii/ml) six times daily. Result: The results revealed that the addition of microalgae in rearing system significantly enhanced (P less than 0.05) the larval survival and developments than without microalgae. The highest larval survival and faster appearance of PL (in days) was observed in T3 group (60.83%, 24.67 days) followed by T4 (56.91%, 28.33 days) T2 (48.39%, 31.33 days) T5 (40.93%, 32.33 days) and T1 (30.65%, 39 days), respectively. Larvae reared at moderate concentrations of microalgae (T3 and T4) resulted in high dry weight that of extreme low (T2) or high (T5) concentrations of microalgae. This study identified the best concentration of Chlorella vulgaris for the rearing of M. rosenbergii larval and could be applicable for the mass larval production of this species commercially.

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