scholarly journals Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil

2007 ◽  
Vol 97 (4) ◽  
pp. 486-497 ◽  
Author(s):  
Michéle de O. D. A. Corrêa ◽  
Virgínia S. Uieda
Keyword(s):  
Seasonal Variation ◽  
Fish Species ◽  
Food Source ◽  
Niche Breadth ◽  
Animal Origin ◽  
Southeastern Brazil ◽  
Important Food ◽  
Important Food Source ◽  
Aquatic Predators ◽  
Food Niche

The objective of this study was to analyze the diet of fish species that use the mangrove vegetation for shelter and feeding in a river southeastern Brazil. The fieldwork, including collecting and underwater observations, was carried out in the dry (July and August 2004) and in the rainy season (February and March 2005) in order to assess the existence of seasonal variation in the diets. Seven kinds of food items were consumed, two of plant origin and five of animal origin. Crustaceans predominated in the diet of most species, either in the form of unidentified fragments or discriminated in eight groups. The predominance of species using mainly a single food source (crustaceans, principally Ostracoda and Tanaidacea) and the existence of seasonal variation in the diets of some species became very evident in the analysis food niche breadth, with a predominance of dietary specialists. In the Rio da Fazenda mangrove, the submersed marginal vegetation was used by the ichthyofauna as a locale for foraging, and principally as cover by bottom-feeding species. These species may be using the vegetation for protection from aerial and aquatic predators, or even from the pull of the current during the turn of the tide. In the study area, the great diversity of crustaceans constitutes an important food source for most fish species which adjusted their diet according to seasonal changes in food availability and to interactions with other species.

Pigeonpea as an important food source

1986 ◽  
Vol 23 (2) ◽  
pp. 103-145 ◽  
Author(s):  
D. K. Salunkhe ◽  
J. K. Chavan ◽  
S. S. Kadam ◽  
N. R. Reddy
Keyword(s):  
Food Source ◽  
Important Food ◽  
Important Food Source

scholarly journals Fruit ontogeny of Garcinia gardneriana (Planch. & Triana) Zappi (Clusiaceae)

2011 ◽  
Vol 25 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Marta Eglaé Camargo Asinelli ◽  
Maria Conceição de Souza ◽  
Káthia Socorro Mathias Mourão
Keyword(s):  
Food Source ◽  
White Pulp ◽  
Important Food ◽  
Fruit Type ◽  
Standard Procedures ◽  
Cell Layers ◽  
Important Food Source ◽  
Structural Aspects ◽  
Yellowish Orange ◽  
Secretory Ducts

Garcinia gardneriana (Clusiaceae) is a small to medium-sized tree that usually occurs on the floodplains of the Paraná River and it is an important food source for the local inhabitants. The fruit itself is consumed in natura, and juices and sweets are made from it. The purpose of this study was to describe morphological and structural aspects of fruits and seeds of this species in order to classify the fruit type and the pulpy layer which involves the seeds. The material analyzed consisted of ovary and fruits in different stages of development, collected from five plants from Aurélio Island, Baía River (MS, BR) and the description was done according to standard procedures in anatomy. The fruit is a yellowish-orange spherical berry ("bacóide" type). The smooth, coriaceous skin consists of the lignified exocarp. The endocarp cell layers are derived from the activity of an adaxial meristem that undergoes radial elongation. The edible sweet white pulp is formed by the endocarp, as well as the spongy mesocarp, in which the secretory ducts lose their function. The unitegmic anatropous ovules develop into anatropous exalbuminous seeds with a collapsed and undifferentiated testa. The embryo is hypocotylar. The features here described generally occur in Clusioideae-Garcinieae and Symphonieae.

scholarly journals Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil)

2014 ◽  
Vol 86 (1) ◽  
pp. 383-406 ◽  
Author(s):  
JÚLIO C. SÁ-OLIVEIRA ◽  
RONALDO ANGELINI ◽  
VICTORIA J. ISAAC-NAHUM
Keyword(s):  
Community Structure ◽  
Seasonal Variation ◽  
Fish Species ◽  
Niche Breadth ◽  
Null Model ◽  
Stomach Contents ◽  
Physical Conditions ◽  
River Damming ◽  
Standard Configuration ◽  
Feeding Resources

We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá Brazilian State. Seasonal samples of fishes were taken using a standard configuration of gillnets, as well as dragnets, lines, and castnets. Five hundred and forty stomach contents, representing 47 fish species were analyzed and quantified. Niche breadth and overlap were estimated using indexes of Levins and Pianka, respectively, while interspecific competition was evaluated using a null model (RA3). ANOVA and the KruskalWallis test were used, respectively, to evaluate differences in niche breadth and overlap between areas. The data indicate that the majority of the fish species belong to the piscivore, omnivore, and detritivore guilds. These species have likely colonized the environments due to the availability of suitable feeding resources, and the favorable physical conditions created by the river damming. Overall, few species have ample niches, but most of them are highly specialized. Resources seasonal variation had little effect on the feeding behavior of most species in the study areas. The null models indicated that competition was not a factor determining on community structure.

Prescribed burning in a Eucalyptus woodland suppresses fruiting of hypogeous fungi, an important food source for mammals

2006 ◽  
Vol 110 (11) ◽  
pp. 1333-1339 ◽  
Author(s):  
James M. Trappe ◽  
A.O. Nicholls ◽  
Andrew W. Claridge ◽  
Steven J. Cork
Keyword(s):  
Food Source ◽  
Prescribed Burning ◽  
Important Food ◽  
Hypogeous Fungi ◽  
Important Food Source

Diet composition and food habits of Diplodus puntazzo (Sparidae) from the Gulf of Gabès (Central Mediterranean)

2013 ◽  
Vol 93 (8) ◽  
pp. 2257-2264 ◽  
Author(s):  
Houda Chaouch ◽  
Olfa Ben Abdallah-Ben Hadj Hamida ◽  
Mohamed Ghorbel ◽  
Othman Jarboui
Keyword(s):  
Food Source ◽  
Feeding Habits ◽  
Feeding Strategy ◽  
Stomach Contents ◽  
Important Food ◽  
Central Mediterranean ◽  
Gulf Of Gabes ◽  
Diplodus Puntazzo ◽  
Gulf Of Gabès ◽  
Important Food Source

The diet and feeding habits of the sharpsnout seabream, Diplodus puntazzo, from the Gulf of Gabès were investigated using stomach contents of 490 specimens ranging from 12.6 cm to 26.1 cm total length in size and from 29.95 g to 230.83 g in weight collected from commercial catches between April 2008 and March 2009. Of the total number of examined stomachs, 279 were empty (%VI = 56.94). This percentage varied significantly with months, attaining a maximum in spring (74.88%) and a minimum in autumn (37.38%). Eight major taxa were identified (Plantae, Spongia, Tunicata, Echinodermata, Crustacea, Annelida, Mollusca and Teleostei) in stomach contents of D. puntazzo. Plants were the most important food source, constituting 89.88% of the total Index of relative importance. The other groups, such as teleosts, molluscs, crustaceans and annelids represented accessory food. Significant differences in diet were observed in relation to season. Plants were the most important food source item in all seasons, especially during the autumn. The estimation of trophic level gave an average of 2.57 ± 0.2 for the whole population of D. puntazzo in the Gulf of Gabès. Based on the composition of its diet, this species may be considered as an omnivorous fish with a preference for vegetable material, and showing specialist feeding strategy.

scholarly journals A Statistical Model for Estimation of Ichthyofauna Quality Based on Water Parameters in Oituz Bazin

2015 ◽  
Vol 17 (1) ◽  
pp. 85-94
Author(s):  
Carmen Popescu ◽  
Dorel Ureche ◽  
Camelia Ureche ◽  
Elena Nechita
Keyword(s):  
Statistical Model ◽  
Surface Waters ◽  
Food Source ◽  
Important Food ◽  
Biometric Data ◽  
Water Parameters ◽  
The People ◽  
Water Ph ◽  
Important Food Source

Abstract Fish represents an important food source for people worldwide. Moreover, although considered a very old occupation, fishing continues to provide jobs, especially for the people living in the coastal countries. The quality of surface waters affects the quality of fish as a food source. For this reason, the present study aims to assess the quality of the ichthyofauna in the Oituz River and some of its tributaries using several parameters that have been computed based on the biometric data of the biological material gathered during 2004-2008, in correlation with the water pH and water temperature. The present paper also highlights some observations regarding the changes of the analyzed ecosystems, as well as some recommendations regarding the fish consumption in the studied basin, considered as a food source for humans.

scholarly journals Parallel analysis of global garlic gene expression and alliin content following leaf wounding

2020 ◽  
Author(s):  
Xuqin Yang ◽  
Yiren SU ◽  
jiaying wu ◽  
wen wan ◽  
Huijian chen ◽  
...  
Keyword(s):  
Gene Expression ◽  
Food Source ◽  
Allium Sativum ◽  
Parallel Analysis ◽  
Biosynthetic Pathways ◽  
Transcriptome Data ◽  
Important Food ◽  
Mature Leaves ◽  
Important Food Source ◽  
Over Time

Abstract Background: Allium sativum (garlic) is an economically important food source and medicinal plant rich in sulfides and other protective substances such as alliin, the precursor of allicin biosynthesis. Cysteine, serine and sulfur is the precursor of alliin biosynthesis. However, little is known about the alliin content under abiotic stress or the mechanism by which its synthesized. Results: The findings revealed that the content of alliin was lowest in the garlic roots, and highest in the buds. Furthermore, alliin levels decreased in mature leaves following wounding. Transcriptome data generated over time after wounding further revealed significant up-regulation of genes integral to the biosynthetic pathways of cysteine and serine in mature garlic leaves. Conclusions: The findings suggest that differential expression of cysteine, serine and sulfide-related genes underlies the accumulation of alliin and its precursors in garlic, providing a basis for further analyses of alliin biosynthesis.

Australian Ants

1999 ◽  
Author(s):  
S Shattuck
Keyword(s):  
Plant Growth ◽  
Soil Structure ◽  
Food Source ◽  
Habitat Preferences ◽  
Important Research ◽  
Important Food ◽  
Research Papers ◽  
Important Food Source ◽  
Growth And Reproduction

Ants are one of the most influential elements in Australian ecosystems, having a major impact on plant growth and reproduction, and soil structure. They act as predators and competitors of other arthropods, and are an important food source for other animals. The book provides details on separating genera from those which are superficially similar and those which are commonly confused. The distribution, habitat preferences and general biologies of each genus are discussed, and there is an introduction to the more important research papers investigating each group.

Sign in / Sign up

Export Citation Format

Share Document