Spatial distribution and abundance of Hemigrapsus crenulatus (H. Milne Edwards, 1837) (Decapoda, Varunidae) in the Puerto Cisnes estuary (44°S, Aysen region, Chile)

Vega-Aguayo, Rolando; Figueroa-Muñoz, Guillermo; Retamal, Marco A.; Ríos, Patricio De los

doi:10.1163/15685403-00003841

Cited by 11 publications

(11 citation statements)

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“…The capture was carried out in the intertidal area of Puerto Cisnes bay (44°44S 72°41W) during the winter of 2017 (Vega-Aguayo et al, 2018). The H. crenulatus specimens were gathered manually at random during low tide under rocks until at least 700 g (N = 406) of wet weight sample had been collected.…”

Section: Capture Of H Crenulatus Specimensmentioning

confidence: 99%

Proximal composition and fatty acid profile of Hemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of “patagonian blenny”Eleginops maclovinus (Cuvier, 1830)

et al. 2021

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The Patagonian blenny (Eleginops maclovinus) is species endemic to South America with physiological characteristics that would facilitate its incorporation into Chilean aquaculture. However, there is currently no specific artificial food that can be used to raise E. maclovinus. In light of this problem, this study describes the proximal composition and fatty acid profile of the crab Hemigrapsus crenulatus, one of the main foods of E. maclovinus. The purpose of the study is to serve as basic information for the development of a specific artificial diet for juveniles of this fish species. The proximal analysis of the complete body of H. crenulatus indicates that it is mainly composed of ash (35.9%), proteins (32.2%), glucides (19.8%) and minor lipids (3.6%). The fatty acid profile is 40.7% PUFAs, 29.7% MUFAs and 29.5% SAFAs, and the most abundant acids are Eicosapentaenoic (18.8%), Oleic (6.8%) and Palmitic (16.6%), respectively. H. crenulatus has highest level of proteins, lipids and PUFAs among the species of the Brachyura infraorder.

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Section: Capture Of H Crenulatus Specimensmentioning

confidence: 99%

Proximal composition and fatty acid profile of Hemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of “patagonian blenny”Eleginops maclovinus (Cuvier, 1830)

et al. 2021

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“…Fishing time was standardized at 12 h (08:00 p.m.-08:00 a.m.). Sampling in the intertidal zone was carried out using the methodology described by Vega-Aguayo et al 16 .…”

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confidence: 99%

“…Retamal 13 , described 227 species collected in the inner seas, Antarctic seas, insular seas, and in front of the continental Chilean territory; Retamal and Ferrada 14 identified 75 species in the area between Guafo bay and Cape Horn; and Thiel and Hinojosa 15 recorded 100 species of Peracarida in the Austral fjords region. Within the Aysen region there is virtually no information about marine crustaceans, with one study from Puerto Cisnes bay describing the spatial distribution and abundance of the intertidal crab Hemigrapsus crenulatus (H. Milne Edwards, 1837) 16 , and another one from the Magdalena sound describing a single benthic species, Balanus laevis (Bruguiére, 1789) 17 .…”

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Scavenging crustacean fauna in the Chilean Patagonian Sea

Figueroa-Muñoz

Retamal

Ríos

et al. 2020

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The marine ecosystem of the Chilean Patagonia is considered structurally and functionally unique, because it is the transition area between the Antarctic climate and the more temperate Pacific region. However, due to its remoteness, there is little information about Patagonian marine biodiversity, which is a problem in the face of the increasing anthropogenic activity in the area. The aim of this study was to analyze community patterns and environmental characteristics of scavenging crustaceans in the Chilean Patagonian Sea, as a basis for comparison with future situations where these organisms may be affected by anthropogenic activities. These organisms play a key ecological role in marine ecosystems and constitute a main food for fish and dolphins, which are recognized as one of the main tourist attractions in the study area. We sampled two sites (Puerto Cisnes bay and Magdalena sound) at four different bathymetric strata, recording a total of 14 taxa that included 7 Decapoda, 5 Amphipoda, 1 Isopoda and 1 Leptostraca. Taxon richness was low, compared to other areas, but similar to other records in the Patagonian region. The crustacean community presented an evident differentiation between the first stratum (0-50 m) and the deepest area in Magdalena sound, mostly influenced by Pseudorchomene sp. and a marked environmental stratification. This species and Isaeopsis sp. are two new records for science. The discovery of undescribed species evidences that this region needs further studies exploring its biodiversity, which is most likely being already impacted by anthropogenic pressure. The Chilean Patagonian region, located between 41°20′S and 55°58′S of latitude in South America, includes one of the most complex systems of channels and fjords of the planet and holds some of the largest estuarine areas of the world 1. It contains approximately 1,600 km of shoreline and a surface of 2,400 km 2 , being a transition zone of climatological, biogeographical and biological conditions between the Antarctic and the temperate Pacific regions 2. This situation produces an ecosystem that can be considered structurally and functionally unique 3. The ecological and physicochemical characteristics of a fjord are mainly controlled by the interaction of fresh water flowing from the rivers and the entrance of sea water depending on marine currents and tides 4. This creates a strong vertical gradient characterized by a halocline (i.e., a rapid vertical change in salinity), with brackish surface waters and saline intermediate and deep waters. Such marked stratification creates specific environmental conditions that often determine the presence of different species assemblages 5. Within the Chilean Patagonia, the Aysén region is subjected to different anthropogenic activities that have the potential to affect the marine biodiversity.

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“…Hemigrapsus crenulatus (H. Milne Edwards, 1837) (Brachyura, Varunidae) is among the most conspicuous inhabitants of intertidal and estuarine environments in the SE Pacific, distributed in Chile from 18°–55°S and also in New Zealand (McLay et al ., 2011; Vega-Aguayo et al ., 2018). While the important ecological and physiological traits of H. crenulatus have been well-documented (Retamal, 1981; Stuardo et al ., 1993; Haye & Ojeda, 1998; Brockerhoff & McLay, 2005; Taylor & Seneviratna, 2005; Riquelme-Bugueño, 2006; Retamal & Moyano, 2010), few studies have focussed on their population dynamics (i.e.…”

Section: Introductionmentioning

confidence: 99%

Annual cycle of growth and population structure of the estuarine crabHemigrapsus crenulatus(Brachyura: Varunidae) off central Chile

et al. 2021

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Estuaries and saltmarshes play a fundamental role in the life cycle of many crab species. Diverse studies show that temperature and salinity modulate abundance, size frequency distribution (SFD), sex ratio and growth in crustaceans. These population parameters are usually challenging to estimate due to the high environmental variability of estuaries. Monthly samples of the estuarine crab Hemigrapsus crenulatus were taken from October 2003 to October 2004 (except July 2004) in the Tubul estuary, central Chile. We quantified temporal changes in abundance, size distribution, sex ratio and monthly growth through the annual cycle. A total of 1025 individuals were collected. Sizes ranged from 7.72–33.51 mm carapace length (CL) with a growth rate ranging between 2.13–30.5% mm CL mo−1. Size and growth rates were greater in spring-summer, suggesting a faster growth of younger crabs correlated with increasing sea temperatures in the austral summer. Overall, sex ratio was 1.75:1 in favour of males. Modal analysis identified at least seven cohorts cohabiting throughout the annual cycle. Growth parameters for males and females were the following, respectively: L∞ = 33.6 and 29.6, k = 0.69 and 0.91, t0 = –0.39 and −0.28. Changes in size distribution suggested a recruitment period during autumn and winter seasons when there are lower salinities and temperature fluctuations stresses. Generalized linear models indicated that sea temperature, salinity and chlorophyll were the environmental variables that better predicted the annual patterns in the population structure.

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Spatial distribution and abundance of Hemigrapsus crenulatus (H. Milne Edwards, 1837) (Decapoda, Varunidae) in the Puerto Cisnes estuary (44°S, Aysen region, Chile)

Cited by 11 publications

References 27 publications

Proximal composition and fatty acid profile of Hemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of “patagonian blenny”Eleginops maclovinus (Cuvier, 1830)

Proximal composition and fatty acid profile of Hemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of “patagonian blenny”Eleginops maclovinus (Cuvier, 1830)

Scavenging crustacean fauna in the Chilean Patagonian Sea

Annual cycle of growth and population structure of the estuarine crabHemigrapsus crenulatus(Brachyura: Varunidae) off central Chile

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