Seasonal stability and spatial variability of parasites in Brazilian sandperchPinguipes brasilianusfrom the Northern Argentine Sea: evidence for stock discrimination

AbstractThree digeneans – Parahemiurus merus (Linton, 1910), Aphanurus stossichii (Monticelli, 1891) and Lecithochirium sp. – and one tetraphyllidean cestode larva were used as biological tags to discriminate the stock of Sardinella aurita (Valenciennes, 1847). In total, 579 fish were examined in five zones off the Tunisian coast, including Bizerte and Kelibia in the north, Mahdia in the east, Gabes and Zarzis in the south. Discriminant analyses used for the separation of S. aurita allowed for the identification of two discrete stocks. Sardinella aurita from Bizerte, Kelibia and Zarzis clumped together as a single stock. Parahemiurus merus and A. stossichii were the most important species in determining the location of sampled fish from these regions. Specimens from Mahdia and Gabes were grouped as one stock characterized by the presence of Lecithochirium sp. and larvae of the Tetraphyllidea. These results were corroborated by comparing the parameters of prevalence and mean abundance of parasites among zones. The separation of S. aurita between localities after pooling specimens from Bizerte, Kelibia and Zarzis and separately pooling those from Mahdia and Gabes also allowed the identification of two discrete stocks, one in offshore waters from Bizerte, Kelibia and Zarzis characterized by the digeneans P. merus and A. stossichii and one in inshore waters from Mahdia and Gabes characterized by Lechithochirium sp. and tetraphyllidean larvae.

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Parasites of the Brazilian sandperch Pinguipes brasilianus Cuvier: a tool for stock discrimination in the Argentine Sea

Journal of Fish Biology ◽

10.1111/j.1095-8649.2008.01800.x ◽

2008 ◽

Vol 72 (6) ◽

pp. 1332-1342 ◽

Cited By ~ 24

Author(s):

J. T. Timi ◽

A. L. Lanfranchi ◽

J. A. Etchegoin ◽

F. Cremonte

Keyword(s):

Argentine Sea ◽

Stock Discrimination

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Parasites of Argentine hake in the Argentine Sea: population and infracommunity structure as evidence for host stock discrimination

Journal of Fish Biology ◽

10.1111/j.0022-1112.2004.00572.x ◽

2004 ◽

Vol 65 (6) ◽

pp. 1472-1488 ◽

Cited By ~ 53

Author(s):

N. H. Sardella ◽

J. T. Timi

Keyword(s):

Argentine Sea ◽

Stock Discrimination ◽

Argentine Hake

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Sampling and mapping of heterogeneous surfaces: multi-resolution tiling adjusted to spatial variability

International Journal of Geographical Information Systems ◽

10.1080/026937996137756 ◽

1996 ◽

Vol 10 (7) ◽

pp. 851-876

Author(s):

Ferenc Csillag ◽

Miklos Kertesz ◽

Agnes Kummert

Keyword(s):

Spatial Variability ◽

Heterogeneous Surfaces

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Spatial variability induces generalization in contextual cueing.

Journal of Experimental Psychology Learning Memory and Cognition ◽

10.1037/xlm0000796 ◽

2020 ◽

Vol 46 (12) ◽

pp. 2295-2313

Author(s):

Yoko Higuchi ◽

Yoshiyuki Ueda ◽

Kazuhisa Shibata ◽

Jun Saiki

Keyword(s):

Spatial Variability ◽

Contextual Cueing

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Spatial variability in responses to environmental conditions in Southern Hemisphere long-finned pilot whales

Marine Ecology Progress Series ◽

10.3354/meps13109 ◽

2019 ◽

Vol 629 ◽

pp. 207-218 ◽

Cited By ~ 1

Author(s):

V Hamilton ◽

K Evans ◽

B Raymond ◽

E Betty ◽

MA Hindell

Keyword(s):

Spatial Variability ◽

Southern Hemisphere ◽

Environmental Conditions ◽

Pilot Whales

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DISTRIBUIÇÃO DA EVAPORAÇÃO EM ESTUFA PLÁSTICA NA PRIMAVERA

Irriga ◽

10.15809/irriga.2001v6n3p120-127 ◽

2001 ◽

Vol 6 (3) ◽

pp. 120-127

Author(s):

Reginaldo Ferreira Santos ◽

Antonio Evaldo Klar

Keyword(s):

Spatial Variability ◽

Pan Evaporation ◽

Spring Season ◽

Class A ◽

Agricultural Sciences ◽

E Mail ◽

Center Area ◽

Class A Pan

DISTRIBUIÇÃO DA EVAPORAÇÃO EM ESTUFA PLÁSTICA NA PRIMAVERA Reginaldo Ferreira SantosCentro de Ciências Exatas e Tecnológica da UNIOESTE- CP 711CEP 858114-110, Cascavel, PR - Fone: 0XX45 2203155. E-mail: [email protected] Evaldo KlarDepartamento de Engenharia Rural - Faculdade de Ciências Agronômica- UNESP - CEP 18603-970 - Botucatu, SP. CP: 237. E-mail: [email protected] 1 RESUMO O presente trabalho teve como objetivo avaliar a distribuição da evaporação no interior de uma estufa plástica, com uma cultura de pimentão, através da variabilidade espacial e comparar a evaporação dos microevaporímetros com os valores do Tanque classe "A". O experimento foi conduzido no Campus da Universidade Estadual Paulista - FCA/UNESP, no período de primavera, em estufa plástica de polietileno de baixa densidade (PEBD). Na distribuição da evaporação em estufa com orientação norte/sul, verificou-se que as maiores evaporações ocorreram nas extremidades sul e norte tendente ao lado oeste. Já as menores evaporações localizaram-se no centro. No período de primavera, a evaporação média nos microevaporímetros superestimou em 55% a evaporação determinada no Tanque classe "A". UNITERMOS: evaporação, geoestatística, estufa. SANTOS, R.F, KLAR, A.E. EVAPORATION DISTRIBUTION INSIDE A PLASTIC TUNNEL IN THE SPRING SEASON 2 ABSTRACT The main aim of this study was to verify the evaporation distribution inside a plastic tunnel, with pepper crop, oriented to north/south, through spatial variability and to compare Class A Pan evaporation to punctual evaporations of 40 equidistant microevaporimeters placed from 50cm the soil. The study was carried out at the College of Agricultural Sciences/UNESP, Botucatu – SP in the spring season. The highest evaporation occurred next to north and to south sides of the tunnel, with tendency to west. Consequently, the lowest evaporations occurred at the center area. The microevaporimeter evaporations were 55% higher than those obtained from Class A Pan. KEYWORDS: evaporation distribution, microevaporimeter.

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