Very few species on Earth are completely r-selected or K-selected. Many species in their natural habitats demonstrate a life strategy that ranges along a continuum between r- and K-selected strategies. Use this information to answer the 3 sub-parts. a) Sea otters are marine mammals that live in northern Pacific coasts. Typical female sea otters reach sexual maturity around 3 or 4 years of age, and they reproduce once a year, producing a single pup. Only female sea otters are tasked with raising the offspring. Mothers constantly take care of their pups until they are 8 months old, but only 25% of the pups survive past the first year. Sea otter fur was highly sought after between the 18th century and the early 20th century. Through conservation efforts, the number of sea otters increased. The current world population is estimated to be between 1 000 and 2 000 individuals, and they are considered to be endangered. Their main food source is sea urchins, molluscs, and crustaceans. Sea urchins are very sensitive to temperature change, and with recent climate change, there have been rapid sea urchin die-offs, leading to a significant reduction of food source for the sea otters in the area. As a population, sea otters could be classified as a. K-selected because only 25% of the pups survive b. K-selected because of the relatively long period of parental care c. K-selected because they are highly dependent on sea urchin population as their main food source d. K-selected because only females take care of the offspring b) King penguins are flightless aquatic birds found primarily in the Southern hemisphere. They live as a large colony and have highly social interactions. King penguins begin reproducing at six years of age and lay one or two eggs per reproductive cycle. Males and females share the incubation duties and raise the chicks together for about 15 months. When the young penguins get older, they form a large group guarded by only a few adult penguins, allowing the parents to forage for food without having to worry about their young. As a population, penguins could be classified as a. r-selected because only a few adult penguins care for the young penguins b. K-selected because they only lay one or two eggs per reproductive cycle c. K-selected because they live in a large colony, often sharing responsibility for caring for the young penguins d. r-selected because of the relatively long breeding cycle c) Atlantic bluefin tuna can reach 450 kg in weight and have high commercial value in the restaurant industry for sushi and sashimi. Although they can live up to 50 years, the bluefins reach maturity around 8 years of age and spawn once a year, releasing approximately 30 million eggs each. The bluefins tend to swim together in large groups and migrate thousands of miles across the Atlantic ocean. There are two known spawning locations: the Gulf of Mexico and the Mediterranean Sea. As a population, tuna could be classified as a. r-selected because they only spawn in two specific locations b. K-selected because they are schooling fish, grouping together c. K-selected because they are migratory fish d. r-selected because they release 30 million eggs per female

Very few species on Earth are completely r-selected or K-selected. Many species in their natural habitats demonstrate a life strategy that ranges along a continuum between r- and K-selected strategies. Use this information to answer the 3 sub-parts. a) Sea otters are marine mammals that live in northern Pacific coasts. Typical female sea otters reach sexual maturity around 3 or 4 years of age, and they reproduce once a year, producing a single pup. Only female sea otters are tasked with raising the offspring. Mothers constantly take care of their pups until they are 8 months old, but only 25% of the pups survive past the first year. Sea otter fur was highly sought after between the 18th century and the early 20th century. Through conservation efforts, the number of sea otters increased. The current world population is estimated to be between 1 000 and 2 000 individuals, and they are considered to be endangered. Their main food source is sea urchins, molluscs, and crustaceans. Sea urchins are very sensitive to temperature change, and with recent climate change, there have been rapid sea urchin die-offs, leading to a significant reduction of food source for the sea otters in the area. As a population, sea otters could be classified as a. K-selected because only 25% of the pups survive b. K-selected because of the relatively long period of parental care c. K-selected because they are highly dependent on sea urchin population as their main food source d. K-selected because only females take care of the offspring b) King penguins are flightless aquatic birds found primarily in the Southern hemisphere. They live as a large colony and have highly social interactions. King penguins begin reproducing at six years of age and lay one or two eggs per reproductive cycle. Males and females share the incubation duties and raise the chicks together for about 15 months. When the young penguins get older, they form a large group guarded by only a few adult penguins, allowing the parents to forage for food without having to worry about their young. As a population, penguins could be classified as a. r-selected because only a few adult penguins care for the young penguins b. K-selected because they only lay one or two eggs per reproductive cycle c. K-selected because they live in a large colony, often sharing responsibility for caring for the young penguins d. r-selected because of the relatively long breeding cycle c) Atlantic bluefin tuna can reach 450 kg in weight and have high commercial value in the restaurant industry for sushi and sashimi. Although they can live up to 50 years, the bluefins reach maturity around 8 years of age and spawn once a year, releasing approximately 30 million eggs each. The bluefins tend to swim together in large groups and migrate thousands of miles across the Atlantic ocean. There are two known spawning locations: the Gulf of Mexico and the Mediterranean Sea. As a population, tuna could be classified as a. r-selected because they only spawn in two specific locations b. K-selected because they are schooling fish, grouping together c. K-selected because they are migratory fish d. r-selected because they release 30 million eggs per female

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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a) Sea otters are marine mammals that live in northern Pacific coasts. Typical female sea otters reach sexual maturity around 3 or 4 years of age, and they reproduce once a year, producing a single pup.

Only female sea otters are tasked with raising the offspring. Mothers constantly take care of their pups until they are 8 months old, but only 25% of the pups survive past the first year.

Sea otter fur was highly sought after between the 18th century and the early 20th century. Through conservation efforts, the number of sea otters increased. The current world population is estimated to be between 1 000 and 2 000 individuals, and they are considered to be endangered.

Their main food source is sea urchins, molluscs, and crustaceans. Sea urchins are very sensitive to temperature change, and with recent climate change, there have been rapid sea urchin die-offs, leading to a significant reduction of food source for the sea otters in the area.

As a population, sea otters could be classified as

a. K-selected because only 25% of the pups survive

b. K-selected because of the relatively long period of parental care

c. K-selected because they are highly dependent on sea urchin population as their main food source

d. K-selected because only females take care of the offspring

b) King penguins are flightless aquatic birds found primarily in the Southern hemisphere. They live as a large colony and have highly social interactions. King penguins begin reproducing at six years of age and lay one or two eggs per reproductive cycle.

Males and females share the incubation duties and raise the chicks together for about 15 months. When the young penguins get older, they form a large group guarded by only a few adult penguins, allowing the parents to forage for food without having to worry about their young.

As a population, penguins could be classified as

a. r-selected because only a few adult penguins care for the young penguins

b. K-selected because they only lay one or two eggs per reproductive cycle

c. K-selected because they live in a large colony, often sharing responsibility for caring for the young penguins

d. r-selected because of the relatively long breeding cycle

c) Atlantic bluefin tuna can reach 450 kg in weight and have high commercial value in the restaurant industry for sushi and sashimi.

Although they can live up to 50 years, the bluefins reach maturity around 8 years of age and spawn once a year, releasing approximately 30 million eggs each.

The bluefins tend to swim together in large groups and migrate thousands of miles across the Atlantic ocean. There are two known spawning locations: the Gulf of Mexico and the Mediterranean Sea.

As a population, tuna could be classified as

a. r-selected because they only spawn in two specific locations

b. K-selected because they are schooling fish, grouping together

c. K-selected because they are migratory fish

d. r-selected because they release 30 million eggs per female

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