Reef fish community in presence of the lionfish (Pterois volitans) in Santa Marta, Colombian Caribbean

ABSTRACT Objective. Fish species community structure and benthic organisms coverage were studied in five localities in Santa Marta where the lionfish is present. Materials and methods. Abundance of fish species, including lion fish, was established using 30 m random visual censuses and video transects; trophic guilds were established according to available references. On the other hand benthic coverage was evaluated using the software Coral Point Count (CPCe) 4.0. Results. Families with higher species numbers were Serranidae, Labridae, and Pomacentridae. Lionfish abundances were low (2.6±2.1 ind/120 m2), but in any case Pterois volitans was observed as the eleventh more abundant species, surpassing species of commercial value such as Cephalopholis cruentata. Species that were found in larger numbers (>100, Thalassoma bifasciatum, Haemulon aurolineatum, Canthigaster rostrata, Abudefduf saxatilis, Chromis cyanea, and Stegastes partitus) were mainly invertebrate eaters, planctivores, and territorial herbivores. Coral coverage showed higher coral percentages in Chengue (69.9%) and Cinto (27.4%), larger sponge percentages in Morro (32.7%); Isla Aguja and Remanso showed the larger figures for abiotic substrate (41.6 and 37%, respectively); corals, sponges, and gorgonians were the components best explaining fish community, but not for the lion fish, which inhabit all studied reef formations. Conclusions. Lion fish is ranked between the 20 more abundant species, with none commercially important species larger, hence no species may qualify as a natural control. Lion fish has as well become a relatively abundant species in Santa Marta reefs, independent of benthic coverage.

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Diets and trophic guilds of demersal fishes of the south-eastern Australian shelf

Marine and Freshwater Research ◽

10.1071/mf99152 ◽

2001 ◽

Vol 52 (4) ◽

pp. 537 ◽

Cited By ~ 64

Author(s):

C. Bulman ◽

F. Althaus ◽

X. He ◽

N. J. Bax ◽

A. Williams

Keyword(s):

Fish Species ◽

Abundant Species ◽

Trophic Guilds ◽

The South ◽

Important Species ◽

Trawl Fishery ◽

South Eastern ◽

Total Fish ◽

Wet Weight ◽

Commercially Important

A total of 8200 stomach samples was collected from 102 fish species caught by trawl or gillnet during research surveys on the south-eastern Australian shelf from 1993 to 1996. Diet compositions were analysed based on percentages of wet weight of prey. Of the total fish examined, 70 species had sufficient stomach samples (i.e. >10) for further analysis. Ten trophic guilds were identified from cluster analysis. Benthic prey dominated the diets. However, analysis on a subset of 28 abundant species that were commercially and ecologically important, showed that pelagic prey was dominant, particularly for 12 quota species. This suggests that pelagic production contributes significantly to the trawl fishery production. Further analysis on the diets of these 28 species found that although fish was more important than invertebrate prey, there was no evidence of significant predation on commercially important species (quota species)by other fish species. A food web diagram was constructed, mostly based on the diet compositions, guild structure and relative abundance of commercially and ecologically important fish species, to show major trophic interactions of the shelf ecosystem.

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Diversity and abundance of cichlids in Ikere Gorge Reservoir, Iseyin, Oyo State, Nigeria

Zoologist (The) ◽

10.4314/tzool.v18i1.9 ◽

2021 ◽

Vol 18 (1) ◽

pp. 52-56

Author(s):

S.O. Ajagbe ◽

R.O. Ajagbe ◽

O.S. Ariwoola ◽

F.I. Abdulazeez ◽

O.O. Oyewole ◽

...

Keyword(s):

Fish Species ◽

Riparian Forest ◽

Abundant Species ◽

Freshwater Ecosystems ◽

Freshwater Species ◽

Fishing Villages ◽

Gorge Reservoir ◽

Commercially Important ◽

Sarotherodon Galilaeus ◽

Fish Species Diversity

Cichlids are highly abundant and commercially important fish in freshwater ecosystems in Nigeria. This study examined the diversity and abundance of cichlids in Ikere Gorge Reservoir. Four fishing villages were randomly selected from 12 fishing villages in Ikere Gorge Reservoir as sampling sites. Cichlids were sampled randomly and examined from fishermen catch in each selected fishing village; were identified with appropriate keys; the weight and abundance of the catches were recorded. The data obtained was subjected to descriptive statistical analysis using SPSS (Version 20.0) software to determine the abundance of fish species. Fish species diversity was carried out by using Palaeontological Statistics (PAST). Eight species of cichlids were sampled in Ikere Gorge but Sarotherodon galilaeus was the most abundant species while the least abundant species was Pelmatolapia mariae. It was observed that, cichlids were abundant in rainy season than in the dry season. Likewise, cichlids were abundant in Ikere-gorge reservoir but they have low diversity. This may be as a result of unsustainable fishing pressure and deforestation of riparian forest and sedimentation in Ikere-gorge reservoir. Therefore, to maintain sustainable fishing activities and improve cichlids population in Ikeregorge reservoir, unsustainable activities in and around Ikere Gorge reservoir should be put under control. Keywords: Cichlidae; freshwater species; dominant; Sarotherodon galilaeus; Pelmatolapia mariae.

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The hydraulic management of the Barra Bonita reservoir (SP, Brazil) as a factor influencing the temporal succession of its fish community

Brazilian Journal of Biology ◽

10.1590/s1519-69842007000300008 ◽

2007 ◽

Vol 67 (3) ◽

pp. 433-445 ◽

Cited By ~ 17

Author(s):

ML. Petesse ◽

M. Petrere Jr. ◽

RJ. Spigolon

Keyword(s):

Fish Species ◽

Fish Community ◽

Abundant Species ◽

Anthropogenic Stress ◽

Reservoir Level ◽

Species List ◽

Adaptation Capacity ◽

Reproductive Structures ◽

Temporal Succession ◽

Reproductive Compensation

The temporal succession of fish communities allows evaluating the environmental conditions and the adaptation capacity of the fish species to anthropogenic stress in reservoirs. The fish community at Barra Bonita reservoir was sampled in two different periods of the year (dry and rainy) and in three different areas of the reservoir (fluvial, transition, and lentic). The species list was compared to another four lists, trying to detect the transformations of the fish community for the last 15 years. In order to evaluate the adaptation of the present fish community to the hydraulic management of reservoir, the trophic and reproductive structures were studied. Temporal succession analysis shows little change in fish richness of the communities. The number of fish species varies between 23 and 39 for a total of 68 registered species. From this, 27 can be considered constant, 14 accessory and 27 accidental; the main differences observed were for Anostomidae, Loricariidae and Characidae families. In relation to the hydraulic management, we found a fish community stabilized and adapted to environmental stress. This is characterized by the dominance of small-sized fish species of opportunistic diet and high reproductive compensation (r-strategists). The overlap of biological cycles of the most abundant species with the reservoir level fluctuations points to the period from September to March-April as critical for reproductive success and only the species with partial reproductive strategy or parental care are best succeeded. These results, interpreted in the context of the reservoir aging process, indicate that Barra Bonita reservoir is entering a transition phase, between the colonization and aging stages.

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The source of bromophenols in some species of Australian ocean fish

Water Science & Technology ◽

10.2166/wst.1995.0416 ◽

1995 ◽

Vol 31 (11) ◽

pp. 113-120 ◽

Cited By ~ 4

Author(s):

F. B. Whitfield ◽

F. Helidoniotis ◽

D. Svoronos ◽

K. J. Shaw ◽

G. L. Ford

Keyword(s):

Marine Algae ◽

Eastern Coast ◽

Gut Contents ◽

Fish Diet ◽

Benthic Organisms ◽

Important Species ◽

Relative Contribution ◽

Fish Diets ◽

Commercially Important ◽

Total Concentrations

The carcass and gut contents of 10 species of fish caught along the eastern coast of Australia were analysed by gas chromatography-multiple ion detection-mass spectrometry for a range of bromophenols including 2- and 4-bromophenol, 2,4- and 2,6-dibromophenol and 2,4,6-tribromophenol. These bromophenols, the cause of iodoform-like off-flavours in seafoods, were found in eight of the above species; the largest total concentrations of bromophenols occurred in the commercially important species Nemadactylus douglasii (40 ng/g). The concentrations of bromophenols in another three species Branchiostegus wardi, Rhabdosargus sarba, and Girella tricuspidata, were found to exceed 10 ng/g while in a further four species their concentrations varied between 3 and 8 ng/g. However, these compounds were not identified in the remaining two species at a detection limit of 0.05 ng/g. The variations among fish diets suggest that the bromophenol content of individual fish can be explained by the relative contribution of benthic organisms and marine algae to the fish diet. Bromophenols were found in all of the benthic carnivores and diverse omnivores examined but were not detected in pelagic carnivorous fish.

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Production and verification of the first Atlantic salmon (Salmo salar L.) clonal lines

10.21203/rs.3.rs-23366/v2 ◽

2020 ◽

Author(s):

tom hansen ◽

David Penman ◽

Kevin Alan Glover ◽

Thomas Fraser ◽

Tone Vågseth ◽

...

Keyword(s):

Atlantic Salmon ◽

Fish Species ◽

High Survival ◽

Important Research ◽

Pressure Shock ◽

Important Species ◽

Genetic Traits ◽

Commercially Important ◽

Clonal Lines ◽

Meiotic Gynogenesis

Abstract Background: In several fish species homozygous and heterozygous clonal lines have been produced using gynogenetic and androgenetic techniques. These lines are standardized and can be reproduced over generations. In rainbow trout such lines have existed for decades and has become important research tools in genome studies as well as in studies of commercially important traits. The Atlantic salmon is one of the best studied fish species globally, but all experiments are done on fish of wild or domesticated origin and access to standardized immortal fish lines would be of great benefit. Here, we describe the protocols developed to produce mitotic gynogenes, and from these the first clonal lines in Atlantic salmon.Results: Atlantic salmon eggs fertilized with UV irradiated sperm combined with a pressure shock applied at 4700 - 4800 minC at 8 oC gave all homozygous (doubled haploid) gynogenetic progeny with high survival. From the six first maturing females, five all homozygous clonal lines were produced by meiotic gynogenesis and were verified as clonal and identical to their mother with microsatellite markers.Conclusions: We have now produced the first documented cloned Atlantic salmon lines. This work demonstrates the potential for production of further Atlantic salmon clonal lines, potentially with distinct characteristics. Such lines will provide an important resource for further elucidation of phenotypic and genetic traits in this globally important species.

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Population Parameters of Two Commercially Important Species belonging to the Family Sciaenidae Encountered in the Coast of Ghana

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2020/v6i330098 ◽

2020 ◽

pp. 21-29

Author(s):

Samuel K. K. Amponsah ◽

Selasi Yao Avornyo ◽

Kofi Ferni Anyan

Keyword(s):

Mortality Rate ◽

Fish Species ◽

Coastal Waters ◽

Total Mortality ◽

Population Parameters ◽

Recruitment Pattern ◽

Important Species ◽

The Family ◽

Exploitation Rate ◽

Commercially Important

Population parameters for two commercially important fishes of Sciaenidae from the coastal waters of Ghana were assessed using length-frequency data obtained from August 2017 to June 2019. Samples of the assessed fish species were obtained through experimental fish trawl along the coast of Greater Accra, Ghana. Trawling was performed every quarter for an average of one hour at an average speed of 3.0 km/hr. In all, a total of 399 samples were measured and the obtained data were analyzed with FiSAT II. The assessed fish species included Pteroscion peli (165 samples) and Pseudotolithus senegalensis (234 samples). The asymptotic length (L∞) was 19.4 cm and 41.5 cm forPteroscion peli and Pseudotolithus senegalensis. Pteroscion peli and Pseudotolithus senegalensis recorded growth rate (K) of 0.48 and 0.50 per year respectively. Both assessed fish species exhibited continuous recruitment pattern with minor and major recruitment peaks. The total mortality rate (Z) was 1.86 and 1.63 per year for Pteroscion peli and Pseudotolithus senegalensis. The fishing mortality rate (F) was estimated at 0.66 and 0.63 per year for Pteroscion peli and Pseudotolithus senegalensis. The natural mortality rate (M) estimated for Pteroscion peli and Pseudotolithus senegalensis was 1.20 and 1.00 per year respectively. The exploitation rate (E) of Pseudotolithus senegalensis (0.39) and Pteroscion peli (0.36) respectively was far below the maximum exploitation rate (Emax), indicating under-exploitation of its fishery in the coastal waters of Ghana, hence the need to enhance the exploitation of these species.

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Composition and Occurrence of Fish Fauna from Thanbyuzayat Township, Mon Coastal Area

Bionatura ◽

10.21931/rb/2020.05.04.14 ◽

2020 ◽

Vol 5 (4) ◽

pp. 1363-1370

Author(s):

Zarni Ko Ko

Keyword(s):

Species Composition ◽

Fish Species ◽

Dominant Species ◽

Fish Fauna ◽

Important Species ◽

Foreign Countries ◽

Commercially Important ◽

Bombay Duck ◽

Study Sites ◽

Important Fish

A total of 48 species of fish fauna were identified during the present study period. The dominant species of fish were found under order Perciformes in all study areas. The most species composition (40) was recorded in Setse fish landing area. The commercially important fish species were mostly found in Kyaikkhami area. Moreover, 17 species of fish were exported to other regions and foreign countries. Among the fish species, species such as Threadfin (Polynemidae), Croaker (Sciaenidae), Hilsa (Clupeidae), Bombay duck (Harpadontidae), Anchovy (Engraulidae), and Pomfret fish (Stomateidae) were the most economically important species. Bombay duck and Anchovy (especially Coilia dussumieri) were more abundant (70%) at the present study sites. Harpodon nehereus and Coilia species were the leading food employed as fresh and dried for local people in the present study areas. Key words: Ichthyology, Taxonomy, Compositions, Occurrence, fish landing centers, Thanbyuzayat Township, Mon Coastal Areas.

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Ichthyofauna of the Mata de Itamacaoca, an urban protected area from the upper Munim River basin, Northern Brazilian Cerrado

Biota Neotropica ◽

10.1590/1676-0611-bn-2020-1116 ◽

2020 ◽

Vol 20 (4) ◽

Author(s):

Elioenai da Silva Oliveira ◽

Erick Cristofore Guimarães ◽

Pâmella Silva de Brito ◽

Lucas de Oliveira Vieira ◽

Rafael Ferreira de Oliveira ◽

...

Keyword(s):

Species Richness ◽

River Basin ◽

Fish Species ◽

Fish Community ◽

Linear Models ◽

Anthropogenic Impacts ◽

Sampling Site ◽

Abundant Species ◽

Diversity Indices ◽

Alien Invasive Species

Abstract: The Munim River basin is one of the main river drainages of the Hydrological unit Maranhão, but there are few published studies which focus on ichthyological surveys and taxonomic work within this basin. The present study aims to provide a fish species inventory of the Mata da Itamacaoca, one of the few urban protected areas from the upper Munim River basin, comparing the ichthyofauna with other lists by conducted at the upper Munim River basin. A total of 42 collection expeditions were conducted, the sampling was conducted at five collecting sites distributed within the boundaries of Mata de Itamacaoca, upper Munim River basin. Diversity indices were calculated and generalised linear models (GLMs) were employed to assess differences in species richness, diversity and evenness depending on season and location in relation to the reservoir dam wall. In order to visualize fish community differences, non-metric multidimensional scaling (nMDS) and a one-way PERMANOVA was used to understand whether factors of site, season and location to the dam wall had an effect on fish community compositions. A total of six orders, 13 families, and 23 fish species were found, and the order with the highest species richness, considering all reaches, was Characiformes followed by Cichliformes. The most abundant species was Nannostomus beckfordi, while Pimelodella parnahybae and Hoplerythrinus unitaeniatus were the rarer species sampled. There were no alien invasive species collected within the study area. Species richness was significantly higher below the dam wall, but there were no other significant differences in diversity indices with regards to season or location. Fish community composition was significantly different above and below the dam wall and was significantly affected by sampling site. Season did not have an effect on fish community. This study corroborates other studies conducted in the Unidade Hidrológica Maranhão sensu Hubbert and Renno (2006), that the ichthyofaunal composition and taxonomy of species within this region face major data deficits, anthropogenic impacts, this study may be a baseline for comparing similar environments throughout the region.

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Production and Verification of the First Atlantic Salmon (Salmo salar L.) Clonal Lines

10.21203/rs.3.rs-23366/v1 ◽

2020 ◽

Author(s):

tom hansen ◽

David Penman ◽

Kevin Alan Glover ◽

Thomas Fraser ◽

Tone Vågseth ◽

...

Keyword(s):

Atlantic Salmon ◽

Fish Species ◽

High Survival ◽

Important Research ◽

Pressure Shock ◽

Important Species ◽

Genetic Traits ◽

Commercially Important ◽

Clonal Lines ◽

Meiotic Gynogenesis

Abstract Background In several fish species homozygous and heterozygous clonal lines have been produced using gynogenetic and androgenetic techniques. These lines are standardized and can be reproduced over generations. In rainbow trout such lines have existed for decades and has become important research tools in genome studies as well as in studies of commercially important traits. The Atlantic salmon is one of the best studied fish species globally, but all experiments are done on fish of wild or domesticated origin and access to standardized immortal fish lines would be of great benefit. Here, we describe the protocols developed to produce mitotic gynogenes, and from these the first clonal lines in Atlantic salmon.Results Atlantic salmon eggs fertilized with UV irradiated sperm combined with a pressure shock applied at 4700–4800 minC at 8 oC gave all homozygous (doubled haploid) gynogenetic progeny with high survival. From the six first maturing females, five all homozygous clonal lines were produced by meiotic gynogenesis and were verified as clonal and identical to their mother with microsatellite markers.Conclusions We have now produced the first documented cloned Atlantic salmon lines. This work demonstrates the potential for production of further Atlantic salmon clonal lines, potentially with distinct characteristics. Such lines will provide an important resource for further elucidation of phenotypic and genetic traits in this globally important species.

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A trap with a twist: evaluating a bycatch reduction device to prevent rockfish capture in crustacean traps

ICES Journal of Marine Science ◽

10.1093/icesjms/fss138 ◽

2012 ◽

Vol 70 (1) ◽

pp. 114-122 ◽

Cited By ~ 8

Author(s):

Brett Favaro ◽

Stefanie D. Duff ◽

Isabelle M. Côté

Keyword(s):

Fish Species ◽

Target Species ◽

Important Species ◽

Incidental Capture ◽

Bycatch Reduction ◽

Target Fish ◽

Commercially Important ◽

Catch Rates ◽

Novel Devices

Abstract Favaro, B., Duff, S. D., and Côté, I. M. 2013. A trap with a twist: evaluating a bycatch reduction device to prevent rockfish capture in crustacean traps. – ICES Journal of Marine Science, 70:114–122. Bycatch, or the incidental capture of non-target species, occurs in fisheries around the world, with often detrimental ecological consequences. Bycatch reduction devices (BRDs) that increase catch specificity have been used successfully in some fisheries, and the development of such devices remains an important component of the global effort to reduce bycatch rates. We tested novel devices designed to exclude juvenile rockfish (Sebastes spp.) from traps used to catch spot prawns (Pandalus platyceros), a commercially important species in British Columbia, Canada. The devices included reductions in trap opening sizes and novel bent-tunnel openings. Reducing trap opening size did not affect bycatch rates of rockfish or other non-target fish species. In contrast, bent-tunnel BRDs eliminated rockfish bycatch, and two of the bent-tunnel variants also excluded other fish species. However, prawn catch rates were reduced in all modified gear, and large prawns were often excluded more than small prawns. Videos recorded in situ revealed that prawn attempts to enter traps took longer and were more likely to fail in BRD-equipped than in unmodified traps. We conclude that bent-tunnel BRDs have the potential to be useful, but improvements are needed to increase prawn catch to levels similar to that of unmodified traps.

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