,ANS2601 Assignment 2 (COMPLETE ANSWERS)
Semester 1 2025 - DUE 11 April 2025
Question 1 [33]
1.1 Provide the complete taxonomy of the Mozambique tilapia.
(14)
1.2 What sense organs are used by sharks for the detection of
prey? (8)
1.3 What two characteristics distinguish the skeletons of
cartilaginous fish from other vertebrates?
(2)
1.4 Name the organ/s associated with maintaining buoyancy in
bony fish. (4)
1.5 Describe a heterocercal tail.
(3)
1.6 Approximately, what percentage of sharks’ diet contains
bony fish? (2)
1.1 Complete Taxonomy of the Mozambique Tilapia
(Oreochromis mossambicus) (14)
Taxonomy is the scientific classification of organisms
based on shared characteristics. The Mozambique tilapia
, (Oreochromis mossambicus) belongs to the following
taxonomic hierarchy:
1. Kingdom: Animalia – This kingdom includes all
multicellular, eukaryotic organisms that are
heterotrophic (consume other organisms for
energy).
2. Phylum: Chordata – This phylum includes animals
with a notochord, a dorsal nerve cord, pharyngeal
slits, and a post-anal tail at some stage in their
development.
3. Class: Actinopterygii – Also known as ray-finned
fishes, this class includes fish that have fins
supported by bony spines (rays) rather than fleshy
lobes.
4. Order: Cichliformes – This order contains cichlids,
which are known for their diverse adaptations to
different aquatic environments.
5. Family: Cichlidae – The cichlid family is one of the
largest fish families, comprising species with varied
feeding habits and parental care strategies.
6. Genus: Oreochromis – This genus includes tilapia
species that are mouthbrooders, meaning they carry
their eggs and fry in their mouths for protection.
7. Species: Oreochromis mossambicus – Commonly
known as the Mozambique tilapia, this species is
Semester 1 2025 - DUE 11 April 2025
Question 1 [33]
1.1 Provide the complete taxonomy of the Mozambique tilapia.
(14)
1.2 What sense organs are used by sharks for the detection of
prey? (8)
1.3 What two characteristics distinguish the skeletons of
cartilaginous fish from other vertebrates?
(2)
1.4 Name the organ/s associated with maintaining buoyancy in
bony fish. (4)
1.5 Describe a heterocercal tail.
(3)
1.6 Approximately, what percentage of sharks’ diet contains
bony fish? (2)
1.1 Complete Taxonomy of the Mozambique Tilapia
(Oreochromis mossambicus) (14)
Taxonomy is the scientific classification of organisms
based on shared characteristics. The Mozambique tilapia
, (Oreochromis mossambicus) belongs to the following
taxonomic hierarchy:
1. Kingdom: Animalia – This kingdom includes all
multicellular, eukaryotic organisms that are
heterotrophic (consume other organisms for
energy).
2. Phylum: Chordata – This phylum includes animals
with a notochord, a dorsal nerve cord, pharyngeal
slits, and a post-anal tail at some stage in their
development.
3. Class: Actinopterygii – Also known as ray-finned
fishes, this class includes fish that have fins
supported by bony spines (rays) rather than fleshy
lobes.
4. Order: Cichliformes – This order contains cichlids,
which are known for their diverse adaptations to
different aquatic environments.
5. Family: Cichlidae – The cichlid family is one of the
largest fish families, comprising species with varied
feeding habits and parental care strategies.
6. Genus: Oreochromis – This genus includes tilapia
species that are mouthbrooders, meaning they carry
their eggs and fry in their mouths for protection.
7. Species: Oreochromis mossambicus – Commonly
known as the Mozambique tilapia, this species is
