Intraplant habitat and feeding preference of two gastropod herbivores inhabiting the kelp Laminaria hyperborea

The habitat and feeding preference of two gastropod mesoherbivore species, Ansates (Helcion) pellucida and Lacuna vincta, inhabiting the kelp Laminaria hyperborea were investigated by studying the distribution, habitat choice and food preference of the herbivores between new and old kelp fronds. Nitrogen content and chemical defence (phlorotannin) level of the kelp fronds were measured in order to determine whether they were correlated with the feeding preference of the herbivores. The habitat choice of Lacuna vincta was correlated with the food preference of this species, while the habitat choice of A. pellucida probably was due to some other factor, e.g. competition or mortality. Ansates pellucida preferred to reside on the old fronds of Laminaria hyperborea, but consumed an equal amount of both tissue types. Lacuna vincta, however, preferred the new Laminaria hyperborea fronds both as habitat and food. There was a large variation in the phlorotannin content among the tissue samples of L. hyperborea. However, there were no overall statistically significant differences in tissue nitrogen or phlorotannin content between the new and the old L. hyperborea fronds.

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Parâmetros biológicos de Euschistus heros (Fabricius, 1794) alimentado com diferentes dietas

Revista Agraria Academica ◽

10.32406/v4n12021/152-159/agrariacad ◽

2021 ◽

Vol 4 (1) ◽

pp. 152-159

Author(s):

Yves Pierre Harry Dalleinne ◽

◽

Aline Giothi ◽

Rosane Betina Wandscheer ◽

Ivonete Hoss ◽

...

Keyword(s):

Food Preference ◽

Eating Habits ◽

Feeding Preference ◽

Stink Bug ◽

Euschistus Heros ◽

Males And Females ◽

Seeds And Fruits

During their development, insects can suck plant structures like seeds and fruits being the preferred structures. The study aims to monitor the eating habits of these insects are relevant mainly in terms of food preference and development. The objective of this work was to analyze the feeding preference of Euschistus heros (brown stink bug) fed with 5 diets. The different diets studied resulted in insects in adult, with significant differences in the length of the nymph period, differences in the weights of males and females and variation in survival during the experiment.

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Seasonal growth and carbon and nitrogen content in canopy and first-year plants of Laminaria hyperborea (Laminariales, Phaeophyceae)

Phycologia ◽

10.2216/i0031-8884-35-1-1.1 ◽

1996 ◽

Vol 35 (1) ◽

pp. 1-8 ◽

Cited By ~ 22

Author(s):

Kjersti Sjøtun ◽

Stein Fredriksen ◽

Jan Rueness

Keyword(s):

Nitrogen Content ◽

First Year ◽

Seasonal Growth ◽

Laminaria Hyperborea ◽

Carbon And Nitrogen ◽

Carbon And Nitrogen Content

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Nitrogen-fixing and non-fixing trees differ in leaf chemistry and defence but not herbivory in a lowland Costa Rican rain forest

Journal of Tropical Ecology ◽

10.1017/s0266467419000233 ◽

2019 ◽

Vol 35 (6) ◽

pp. 270-279

Author(s):

Benton N. Taylor ◽

Laura R. Ostrowsky

Keyword(s):

Nitrogen Content ◽

Rain Forest ◽

Chemical Defence ◽

Leaf Nitrogen ◽

Leaf Nitrogen Content ◽

Nitrogen Fixing ◽

Leaf Toughness ◽

High Productivity ◽

Nitrogen Fixers ◽

Nitrogen Inputs

AbstractNitrogen-fixing plants provide critical nitrogen inputs that support the high productivity of tropical forests, but our understanding of the ecology of nitrogen fixers – and especially their interactions with herbivores – remains incomplete. Herbivores may interact differently with nitrogen fixers vs. non-fixers due to differences in leaf nitrogen content and herbivore defence strategies. To examine these potential differences, our study compared leaf carbon, nitrogen, toughness, chemical defence and herbivory for four nitrogen-fixing tree species (Inga oerstediana, Inga sapindoides, Inga thibaudiana and Pentaclethra macroloba) and three non-fixing species (Anaxagorea crassipetala, Casearia arborea and Dipteryx panamensis) in a lowland tropical rain forest. Leaf chemical defence, not nutritional content, was the primary driver of herbivore damage among our species. Even though nitrogen fixers exhibited 21.1% higher leaf nitrogen content, 20.1% lower C:N ratios and 15.4% lower leaf toughness than non-fixers, we found no differences in herbivory or chemical defence between these two plant groups. Our results do not support the common hypotheses that nitrogen fixers experience preferential herbivory or that they produce more nitrogen-rich defensive compounds than non-fixers. Rather, these findings suggest strong species-specific differences in plant–herbivore relationships among both nitrogen-fixing and non-fixing tropical trees.

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Current and historical relationships between the tissue nitrogen content of a snowbed bryophyte and nitrogenous air pollution

Environmental Pollution ◽

10.1016/0269-7491(95)00071-2 ◽

1996 ◽

Vol 91 (3) ◽

pp. 283-288 ◽

Cited By ~ 13

Author(s):

C.E. Woolgrove ◽

S.J. Woodin

Keyword(s):

Air Pollution ◽

Nitrogen Content ◽

Tissue Nitrogen

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Distribution, feeding behavior and control strategies of the exotic land snail Achatina fulica (Gastropoda: Pulmonata) in the northeast of Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842008000400020 ◽

2008 ◽

Vol 68 (4) ◽

pp. 837-842 ◽

Cited By ~ 23

Author(s):

FS. Albuquerque ◽

MC. Peso-Aguiar ◽

MJT. Assunção-Albuquerque

Keyword(s):

Ricinus Communis ◽

Control Strategies ◽

Food Preferences ◽

Habitat Choice ◽

Land Snail ◽

Feeding Preference ◽

Catch Per Unit Effort ◽

Mentha Spicata ◽

Lippia Alba ◽

And Control

The goal of this study was to document the distribution and establishment A. fulica such as their feeding preference and behavior in situ. The study was carried out at the city of Lauro de Freitas, Bahia state, Brazil, between November 2001 and November 2002. We used catch per unit effort methods to determine abundance, distribution, habitat choice and food preferences. The abundance and distribution of A. fulica was most representative in urban area, mainly near to the coastline. Lots and house gardens were the most preferred sites during active hours. The results indicated that A. fulica started their activity at the end of the evening and stopped in mid-morning. Their preferred food were vascular plants such as Hibiscus syriacus, Ricinus communis, Carica papaya, Galinsonga coccinea, Lippia alba, Ixora coccinea, Musa parasidisiaca, Mentha spicata and Cymbopogon citrates. Our results indicate that A. fulica are well adapted and established in this city and modified environments facilitate their establishment and dispersion. However, human perturbation, such as clearance of lots could be limiting for the persistence of A. fulica populations.

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Revision of some mensural measurements, food preference, and haematological parameters in breeding pairs of blue rock pigeon, Columba livia sampled from punjab Pakistan

Brazilian Journal of Biology ◽

10.1590/1519-6984.252059 ◽

2023 ◽

Vol 83 ◽

Author(s):

M. W. Aslam ◽

M. Wajid ◽

A. Waheed ◽

S. Ahmad ◽

K. Jafar ◽

...

Keyword(s):

Body Weight ◽

Food Preference ◽

Columba Livia ◽

Feeding Preference ◽

Chest Circumference ◽

Haematological Parameters ◽

Gut Contents ◽

Primary Feather ◽

Haematological Profile ◽

Rock Pigeon

Abstract The present study describes the haematological profile, feeding preference, and comparison of morphometric characters of blue rock pigeon (Columba livia) breeding pairs. For this purpose, 25 pairs (25 samples per sex) were sampled through Mist nets from district Okara and Bahawalnagar, Punjab, Pakistan. Birds were then anaesthetized with a combination of ketamine HCL (10 mg/kg) and diazepam (0.2 mg/kg) and subjected to morphometric measurements. 5µL blood also was taken from the jugular vein of each anaesthetized bird for haematological analysis. Few pairs were also dissected to remove gastrointestinal tracts (GITs) for food preferences. Results revealed that there are no significant differences in the haematological parameters and feeding preference of breeding pairs of Columba livia. The gut analysis further revealed, the major portion of gut contents consisted of pea and corn in most of the pairs. Regarding the mensural measurements, significant differences were recorded in the body weight, length of the longest primary feather, and chest circumference, whereas the rest of the studied parameters remain nonsignificant between sexes. So, it is concluded that apart from 3 morphometric parameters (body weight, length of longest primary feather and chest circumference), both sexes are alike in term of morphometry, haematology and food preference.

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fish–macrofauna interactions in a kelp (laminaria hyperborea) forest

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315405012439 ◽

2005 ◽

Vol 85 (5) ◽

pp. 1279-1286 ◽

Cited By ~ 94

Author(s):

k.m. norderhaug ◽

h. christie ◽

j.h. fosså ◽

s. fredriksen

Keyword(s):

Fish Species ◽

Diurnal Cycle ◽

Gadus Morhua ◽

Kelp Forest ◽

Stomach Contents ◽

Laminaria Hyperborea ◽

Lacuna Vincta ◽

Important Prey ◽

Myoxocephalus Scorpius ◽

Labrus Bergylta

predator–prey interactions between fish and macrofauna in kelp (laminaria hyperboea) forest were examined. fish were caught in gill-nets and fish traps at two sites and throughout the diurnal cycle. their stomach contents were analysed. the most abundant fish species, except pollachius virens, were caught in larger numbers at night than during daytime. the examined fish fed throughout the diurnal cycle and kelp-associated fauna were found to be important prey. pollachius virens was caught in the same numbers throughout the diurnal cycle and contained mainly pelagic prey, in larger numbers during the day than at night. small labrids were specialists, feeding mainly on the two numerically dominant kelp-associated gastropods rissoa parva and lacuna vincta. the larger labrus bergylta, gadus morhua and myoxocephalus scorpius were generalists, feeding on a large range of kelp-associated invertebrates. some fish species showed preference for particular vertical levels when feeding in the kelp forest. the most mobile and/or the largest invertebrates were most heavily preyed upon.

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Effects of Feeding a Diet Containing Lactose Upon ß-d-Galactosidase Activity and Organ Development in the Rat Digestive Tract

American Journal of Physiology-Legacy Content ◽

10.1152/ajplegacy.1956.188.1.49 ◽

1956 ◽

Vol 188 (1) ◽

pp. 49-53 ◽

Cited By ~ 38

Author(s):

Jessie E. Fischer

Keyword(s):

Small Intestine ◽

Nitrogen Content ◽

Total Nitrogen ◽

Specific Activity ◽

Pancreas Development ◽

Galactosidase Activity ◽

Fresh Weight ◽

Rat Stomach ◽

Enhancing Effect ◽

Tissue Nitrogen

Feeding a 25% lactose diet had no enhancing effect upon rat stomach or pancreas development or upon ß-d-galactosidase activity in stomach lining or pancreas. The lactose feeding significantly increased the cleaned small intestine fresh weight and total nitrogen. This increase in total nitrogen appeared to be due mainly to growth of the mucous epithelium, since the nitrogen content was significantly increased in the epithelium but not in the rest of the small intestine. The total ß-d-galactosidase activity of the small intestine mucous epithelium was significantly increased by the lactose feeding, but the specific activity (units of enzyme per milligram of tissue nitrogen) was not significantly altered.

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