Variaciones en la abundancia de peces en sitios con diferente grado de contaminación del sublitoral de Ciudad de La Habana, Cuba

Abstract

Abundance variations of fishes from sites with different levels of pollution in the sublittoral sector of Havana City, Cuba. The impact of human activity affects fish populations. We studied the abundance of three selected fish species (Stegastes partitus, Thalassoma bifasciatum and Halichoeres bivittatus) in four sites with different degrees of pollution in Havana City: 30 th street and 16 th street; Miramar; Red Boy of Havana Bay; and the ending of Almendares´s River. The sites were divided into five zones depending on their bottom characteristics. The counts were made with the visual census technique with a 5m 2 quadrat, from June-July 2003 to January 2004. Each time we made nine counts per zone. S. partitus and T. bifasciatum were more abundant in clean water areas, while Halichoeres bivittatus seems to resist the levels of pollution present in the area. Rev.

Spatio-temporal composition of aquatic birds community in Juluapan Lagoon, Colima, Mexican Central Pacific

“…An example is Cuyutlán Lagoon, which has an area of 7 200 ha (73 times larger than Juluapan) and 57 aquatic bird species during the non-reproductive season (Mellink & de la Riva, 2005), which indicates that Juluapan contributes importantly to aquatic bird richness and diversity on the Colima coast. Shorebirds and waders were the most representative groups by number of species in Juluapan, which corresponds to a common pattern observed in nearby wetlands, such as the Agua Dulce Lagoon, El Ermitaño Estuary (Hernández-Vázquez, 2005a), and Barra de Navidad Lagoon (Hernández-Vázquez et al, 2022). These wetlands present similar characteristics in terms of the availability of soft substrates exposed at low tides, dense vegetation, and mangroves in the surrounding area, which favors the presence of more birds, mainly shorebirds and waders.…”

“…There is evidence of the negative effects of human presence on the feeding and resting activities of aquatic birds (Burger, 1981;Burger, 1994;Burger & Gochfeld, 1998), as it leads to a decrease in feeding efficiency and resting time, resulting in greater energy spent to constantly escape humans (Burger, 1986). A similar pattern was observed in Barra de Navidad Lagoon, Jalisco, where bird richness and abundance were affected in areas with greater anthropogenic activity (presence of tourists and boat traffic), which was more evident in the shorebird group (Hernández-Vázquez et al, 2022).…”

“…This substrate was used for the construction of four N. violacea nests and one Butorides virescens nest. During later visits (eight visits from May to August 2018), approximately 64 nests of three wader species (N. violacea, B. virescens, and Cochlearius cochlearius) were recorded (Hernández-Vázquez et al, 2022); these data represent the first reports of nesting in this lagoon. In addition to nesting, mangroves in zone 2 also provided refuge and protection for several marine species, as was observed mainly for Fregata magnificens, P. occidentalis, and Nannopterum brasilianum, and several wader species.…”

HELMINTOS PARÁSITOS DE <i>Halichoeres bivittatus</i> (PISCES: LABRIDAE) DEL SUROESTE DEL GOLFO DE MÉXICO

“…Halichoeres bivittatus (Bloch, 1791) (Pisces: Labridae) especie conocida localmente como Doncella rayada, se distribuye desde Carolina del Norte a Brasil, incluyendo el Golfo de México y el Mar Caribe, habitando comúnmente áreas rocosas y de arrecifes poco profundos, con hábitos alimenticios heterótrofos a base principalmente de gasterópodos (Cervigón, 1993). La Doncella rayada no tiene importancia pesquera artesanal; sin embargo, es muy abundante en arrecifes costeros y en escolleras en la línea costera (Clavijo y Donaldson, 1994;Hernández-Hernández et al, 2009), pero su importancia radica en su abundancia, como un componente importante en las interacciones tanto intraespecíficas como interespecíficas que se establecen en los ecosistemas. Por otro lado, los estudios sobre helmintos parásitos en lábridos son limitados, Muñoz et al (2007) recopilaron las especies de helmintos parásitos para lábridos a nivel global; para H. bivittatus (Bloch) los registros corresponden a Neoapocreadium coili (Sogandares-Bernal, 1959) (Sogandares-Bernal y Sogandares, 1961), Proctoeces maculatus (Looss, 1901) (Shimazu y Nagasawa, 1985), P. subtenuis (Linton, 1907) (Linton, 1907), Schikhobalotrema adacutuum (Manter, 1938) (Manter, 1947), Lecithochirium latum (Vigueras, 1958) (Pérez-Vigueras, 1958, Coitocaecum sp.…”