The status of Anaecypris hispanica in Portugal: Problems of conserving a highly endangered Iberian fish

Collares‐Pereira, Maria João; Cowx, I. G.; Rodrigues, J. A.; Rogado, Leonor; Costa, L. Moreira Da

doi:10.1016/s0006-3207(98)00103-7

Cited by 27 publications

(45 citation statements)

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“…These movements are probably two-fold: (i) migration of mature fish upstream to reproduce, followed by (ii) downstream dispersion, especially of larger individuals, to avoid the harsh drought conditions and being caught in the poor water quality conditions experienced in the few remaining permanent pools (Collares- Pereira et al, 1999;Pires et al, 1999). Cobitis paludica and Leuciscus pyrenaicus seem to occupy the same areas throughout the year, suggesting individuals probably do not move for the reasons given earlier.…”

Section: Discussionmentioning

confidence: 99%

Spatial modelling of freshwater fish in semi‐arid river systems: a tool for conservation

Filipe

Cowx

Collares‐Pereira

2002

River Research & Apps

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This paper examines the feasibility of using multivariate statistics to model fish species distribution and habitat requirements for intermittent streams in semi-arid regions, many of which are coming under increasing pressure from water resource development schemes. The assessment was based on the geographical distribution of six endemic fish species in the Guadiana river, a semi-arid river system in southern Iberia. Their presence was related to 20 environmental variables linked to climate, geomorphology, riparian vegetation and location in the drainage basin. These variables were collected in the field or from topographical maps to evaluate habitat suitability and to predict the presence of the species according to season. Multivariate logistic regression in a geographic information system (GIS) environment was performed to identify regions with high probability of occurrence for each species. The variables that best explained the occurrence of the species were the sample location in the drainage basin, the geomorphology and the riparian vegetation. The models presented have a high predictive power and can be used in monitoring and predicting temporal changes caused by human activities. This modelling approach can be used to predict the areas that need to be conserved to protect or rehabilitate the endangered species. Armed with this information, managers can formulate conservation measures to prevent further degradation of the stocks and possibly enhance the populations.

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Section: Discussionmentioning

confidence: 99%

Spatial modelling of freshwater fish in semi‐arid river systems: a tool for conservation

Filipe

Cowx

Collares‐Pereira

2002

River Research & Apps

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“…This species was introduced in many countries, such as Portugal (Colares-Pereira et al 1999), Spain (Elvira and Almodóvar 2001), Italy (Orrù et al 2010), Czech Republic (Musil et al 2010), Kenya (Britton and Harper 2006), Mozambique (Weyl and Hecht 1999), Japan (Takamura 2007), and South Korea (Lee et al 2010), due to its qualities, which make it suitable for sport-fishing. In Brazil, M. salmoides was introduced in Belo Horizonte, in 1922, for aquaculture purposes.…”

Section: Introductionmentioning

confidence: 99%

Biology of black bass Micropterus salmoides (LacepÃ¨de, 1802) fifty years after the introduction in a small drainage of the Upper ParanÃ¡ River basin, Brazil

et al. 2014

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Garcia DAZ, Costa ADA, Leme GLA, Orsi ML. 2014. Biology of black bass Micropterus salmoides (LacepÃ¨de, 1802) fifty years after the introduction in a small drainage of the Upper ParanÃ¡ River basin, Brazil. Biodiversitas 15: 180-185. The dispersion of organisms byhuman actions has been the major source of changes in the natural distribution of species, making the introduction of non-native speciesa threat to biological diversity. Micropterus salmoides is a fish originating from North America, which was introduced in a lagoon in theEcological Park of Fazenda Monte Alegre in southern Brazil over 50 years ago. The reproductive activity, weight-length relationshipand relative condition factor were analyzed to evaluate the health parameters of the species. The result allows us to classify thereproductive activity of this population as moderate. It was found that the health condition patterns are identical to those theoreticallyexpected. The occurrence of individuals downstream of the lagoon shows that the population has been presenting dispersion conditionsto new environments, posing a threat to local biodiversity. Management measures, such as isolation or eradication of the population, arerequired to control the species within the studied site, and prevent its dispersion into natural watercourses.

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“…The species was introduced for sport-fishing purposes in many countries like Japan (Yodo & Kimura, 1996), Kenya (Aloo & Dadzie, 1995), Mozambique (Weyl & Hecht, 1999), Italy (Lorenzoni et al, 2002), Spain (Elvia & Almodóvar, 2001), and Portugal (Colares-Pereira et al, 1999). In almost all of such countries, undesirable side effects on native fauna have been reported.…”

Section: Introductionmentioning

confidence: 99%

Growth and mortality of black bass, Micropterus salmoides (Pisces, Centrachidae; Lacapède, 1802) in a reservoir in southern Brazil

Schulz

Leal

2005

Braz. J. Biol.

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The black bass, Micropterus salmoides, was introduced to Brazil from North America in 1922. Since then the species has been reared in aquaculture facilities intended to stock reservoirs as additions to native stocks available for angling. At present no scientific information on the biology of black bass in Brazilian waters is available. Since black bass dispersion may cause severe impacts on native Brazilian fish fauna, information on the basic biological parameters of this species is necessary. The objective of the present study is to provide information on the growth, age structure, and mortality of the species in a small reservoir in southern Brazil, where the species reproduces regularly. Based on scale readings, the von Bertalanffy growth curve was calculated and compared to the lengthfrequency distribution of the population. Both methods showed similar results. between the first and the second cohort, to 0.8 year -1 between the second and third. The results show that black bass in Brazil grows faster than in its area of origin, but longevity is shorter and body shape, stouter. The cause of high mortality at a relatively early age may be connected with the loss of genetic diversity due to inbreeding of the Brazilian stocks, which originated from few introduced individuals a long time ago. The fact that black bass reproduces in reservoirs and grows rapidly may be considered a threat to conserving fish diversity in Brazilian ecosystems.Key words: Micropterus salmoides, growth, mortality. RESUMOCrescimento e mortalidade do black bass, Micropterus salmoides, (Pisces, Centrachidae; Lacepède, 1802) num reservatório no sul do Brasil O black bass, Micropterus salmoides, proveniente da América do Norte, foi introduzido no Brasil em 1922. A partir dessa data, a espécie foi criada na piscicultura brasileira para fins de soltura em açudes e reservatórios com o objetivo de sustentar a pesca amadora. Atualmente não há informações sobre a biologia da espécie em águas brasileiras. Como a dispersão da espécie em águas naturais pode causar impactos imprevisíveis, é necessário levantar dados sobre parâmetros básicos de sua biologia. O objetivo do presente trabalho é investigar o crescimento, a estrutura etária e a mortalidade da espécie num pequeno reservatório no sul do Brasil, onde ela se reproduz todos os anos. Por meio da leitura de escamas foi calculada a curva de crescimento von Bertalanffy e comparada à distribuição do comprimento. Ambos os métodos chegaram a resultados similares. O comprimento máximo foi de aproximadamente 44 cm. No primeiro ano de vida, o comprimento médio foi de 26,1 cm (d.p. = 13,88); no segundo, 37,3 cm (d.p. = 12,52); e no terceiro, 41,5 cm (d.p. = 9,92 formance de crescimento foi ø' = 3,28 cm ano -1 . A mortalidade Z aumentou aproximadamente quatro vezes, de 0,16 anos -1 entre a primeira e a segunda coorte para 0,8 anos -1 entre a segunda e a terceira coorte. Os resultados mostram que o black bass cresce mais rapidamente no Brasil e tende a ser mais enxuto que em sua área de origem, mas ...

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The status of Anaecypris hispanica in Portugal: Problems of conserving a highly endangered Iberian fish

Cited by 27 publications

References 3 publications

Spatial modelling of freshwater fish in semi‐arid river systems: a tool for conservation

Spatial modelling of freshwater fish in semi‐arid river systems: a tool for conservation

Biology of black bass Micropterus salmoides (LacepÃ¨de, 1802) fifty years after the introduction in a small drainage of the Upper ParanÃ¡ River basin, Brazil

Growth and mortality of black bass, Micropterus salmoides (Pisces, Centrachidae; Lacapède, 1802) in a reservoir in southern Brazil

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